Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Discontinued Operations and Disposal Groups [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Thermal [Member] Thermal [Member] Represents Thermal segment of the entity. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Impairment losses Asset Impairment Charges Equity Method Investments and Joint Ventures [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] DGPV Holdco 2 [Member] NRG DGPV Holdco 2 [Member] NRG DGPV Holdco 2 [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Four Brothers Solar [Member] Four Brothers Solar [Member] Four Brothers Solar [Member] Gen Conn Energy LLC [Member] Gen Conn Energy LLC [Member] Represents the information pertaining to GenConn Energy LLC. DGPV Holdco 3 [Member] DGPV Holdco 3 [Member] DGPV Holdco 3 [Member] DGPV Holdco 1 [Member] DGPV Holdco 1 [Member] DGPV Holdco 1 [Member] Granite Mountain Holdings [Member] Granite Mountain Holdings [Member] Granite Mountain Holdings [Member] Iron Springs Holdings [Member] Iron Springs Holdings [Member] Iron Springs Holdings [Member] RPV Holdco [Member] RPV Holdco [Member] RPV Holdco [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Equity investments in affiliates Equity Method Investments Payments to acquire equity method investments Payments to Acquire Equity Method Investments Power generation capacity, megawatts Power Generation Capacity, Megawatts Power Generation Capacity, Megawatts Remaining lease term Remaining Lease Term Remaining Lease Term Due to affiliate Due to Affiliate Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Accounting Policies [Abstract] Schedule of Cash and Cash Equivalents [Table] Schedule of Cash and Cash Equivalents [Table] Project Level Subsidiaries [Member] Project Level Subsidiaries [Member] Project Level Subsidiaries [Member] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Operating Funds [Member] Operating Funds [Member] Operating Funds [Member] Long Term Debt Current [Member] Long Term Debt Current [Member] Long Term Debt Current [Member] Debt Service Obligations [Member] Debt Service Obligations [Member] Debt Service Obligations [Member] Cash Distribution [Member] Cash Distribution [Member] Subsidiaries Affected By Bankruptcy [Member] Subsidiaries Affected By Bankruptcy [Member] Subsidiaries Affected By Bankruptcy [Member] Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Cash and cash equivalents, held at project subsidiaries Other Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash Cash, cash equivalents and restricted cash shown in the statement of cash flows Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Restricted cash and cash equivalents Restricted Cash and Cash Equivalents Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current Assets Assets, Current [Abstract] Restricted cash Accounts receivable — trade Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable — affiliate Due from Affiliate, Current Inventory Inventory, Net Prepayments and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Property, Plant and Equipment, Net Other Assets Assets, Noncurrent [Abstract] Intangible assets, net Finite-Lived Intangible Assets, Net Derivative instruments Derivative Asset, Noncurrent Deferred income taxes Deferred Income Tax Assets, Net Right of use assets, net Operating Lease, Right-of-Use Asset Other non-current assets Other Assets, Noncurrent Total other assets Other Assets Total Assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current Liabilities Liabilities, Current [Abstract] Current portion of long-term debt Long-term Debt and Lease Obligation, Current Accounts payable — trade Accounts Payable, Current Accounts payable — affiliate Due to Affiliate, Current Derivative instruments Derivative Liability, Current Accrued interest expense Interest Payable Accrued expenses and other current liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Other Liabilities Liabilities, Noncurrent [Abstract] Long-term debt Long-term Debt and Lease Obligation Derivative instruments Derivative Liability, Noncurrent Long-term lease liabilities Operating Lease, Liability, Noncurrent Other non-current liabilities Other Liabilities, Noncurrent Total non-current liabilities Liabilities, Noncurrent Total Liabilities Liabilities Commitments and Contingencies Commitments and Contingencies Stockholders' Equity Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value; 10,000,000 shares authorized; none issued Preferred Stock, Value, Issued Class A, Class B, Class C and Class D common stock, $0.01 par value; 3,000,000,000 shares authorized (Class A 500,000,000, Class B 500,000,000, Class C 1,000,000,000, Class D 1,000,000,000); 193,402,886 shares issued and outstanding (Class A 34,599,645, Class B 42,738,750, Class C 73,325,741, Class D 42,738,750) at June 30, 2019 and 193,251,396 shares issued and outstanding (Class A 34,586,250, Class B 42,738,750, Class C 73,187,646, Class D 42,738,750) at December 31, 2018 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest Total Stockholders' Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total Liabilities and Stockholders' Equity Liabilities and Equity Statement of Comprehensive Income [Abstract] Net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Other Comprehensive (Loss) Gain Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Unrealized gain on derivatives, net of income tax benefit of $0, $0, $0 and ($3) Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments and Tax Other comprehensive gain Other Comprehensive Income (Loss), Net of Tax Comprehensive (Loss) Income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Pre-acquisition net income of Drop Down Assets Less: Pre-acquisition net income of Acquired ROFO assets Less: Pre-acquisition net income of Acquired ROFO assets Less: Comprehensive (loss) income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive (Loss) Income Attributable to Clearway Energy, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Buckthorn Solar Drop Down Asset [Member] Buckthorn Solar Drop Down Asset [Member] Buckthorn Solar Drop Down Asset [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Buckthorn Solar, due 2025 [Member] Buckthorn Solar, due 2025 [Member] Buckthorn Solar, due 2025 [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Business acquisition, percentage of voting interests acquired Business Acquisition, Percentage of Voting Interests Acquired Business combination, consideration transferred Business Combination, Consideration Transferred Business combination, acquisition of less than 100 percent, noncontrolling interest, fair value Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Long-term debt Long-term Debt Net distributions from noncontrolling interests Proceeds from Noncontrolling Interests Power purchase agreement period Power Purchase Agreement Period Represents the period of power purchase agreement Earnings Per Share [Abstract] Earnings Per Share Earnings Per Share [Text Block] Asset Impairments Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Company Structure Clearway Energy Organizational Structure [Table Text Block] Clearway Energy Org Structure [Table Text Block] ECP Uptown Campus LLC ECP Uptown Campus LLC [Member] ECP Uptown Campus LLC [Member] Duquesne University District Energy System Duquesne University District Energy System [Member] Duquesne University District Energy System [Member] Steam and chilled water capacity, megawatts thermal equivalent Steam and Chilled Water Capacity, Megawatts Thermal Equivalent The generation capacity of the entity's thermal power generation facilities as of the balance sheet date, expressed in megawatts thermal equivalent. Purchase price Acquisition funded by cash on hand Payments to Acquire Businesses, Gross Commitments and Contingencies Disclosure [Abstract] Contingencies Commitments and Contingencies Disclosure [Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Common Class A [Member] Common Class C [Member] Common Class C [Member] Statement Statement [Line Items] Operating Revenues Revenues [Abstract] Total operating revenues Revenues Operating Costs and Expenses Operating Costs and Expenses [Abstract] Cost of operations Cost of Revenue Depreciation and amortization Depreciation, Depletion and Amortization General and administrative General and Administrative Expense Transaction and integration costs Business Combination, Acquisition Related Costs Development costs Costs Incurred, Development Costs Total operating costs and expenses Costs and Expenses Operating Income Operating Income (Loss) Other Income (Expense) Costs and Expenses [Abstract] Equity in earnings of unconsolidated affiliates Income (Loss) from Equity Method Investments Other income, net Other Nonoperating Income (Expense) Loss on debt extinguishment Gain (Loss) on Extinguishment of Debt Interest expense Interest Expense Total other expense, net Nonoperating Income (Expense) (Loss) Income Before Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense (benefit) Income Tax Expense (Benefit) Net (Loss) Income Net (Loss) Income Excluding Pre-acquisition Net Income of Drop Down Assets Net Income excluding pre-acquisition net income of Acquired ROFO assets Net Income excluding pre-acquisition net income of Acquired ROFO assets Less: (Loss) Income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net (Loss) Income Attributable to Clearway Energy, Inc. Net Income (Loss) Available to Common Stockholders, Basic (Losses) Earnings Per Share Attributable to Clearway Energy, Inc. Class A and Class C Common Stockholders Weighted average number of common shares outstanding — basic (in dollars per share) Weighted Average Number of Shares Outstanding, Basic Weighted average number of common shares outstanding — diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted Earnings per weighted average common (in dollars per share) Earnings Per Share, Basic Earnings per weighted average common share — diluted (in dollars per share) Earnings Per Share, Diluted Common stock, dividends, per share, cash paid (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Leases [Abstract] Lease Cost Lease, Cost [Table Text Block] Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Future Minimum Lease Commitments Lessee, Operating Lease, Disclosure [Table Text Block] Revenue Related to Leases Lessor Revenue [Table Text Block] Lessor Revenue [Table Text Block] Minimum Future Rent Payments under Operating Leases Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] Future Minimum Lease Commitments Under Operating Leases Lessor, Operating Leases, Property, Plant and Equipment [Table Text Block] Lessor, Operating Leases, Property, Plant and Equipment [Table Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Power Generation Facilities by Type [Axis] Power Generation Facilities by Type [Axis] The types of power generation facilities included in the entity's total global generation portfolio. Power Generation Facilities, Type [Domain] Power Generation Facilities, Type [Domain] Listing of power generation facilities included in the entity's total global generation portfolio. Solar Facilities [Member] Solar Facilities [Member] Solar Facilities [Member] PG&E [Member] PG&E [Member] PG&E [Member] Marsh Landing [Member] Marsh Landing [Member] Marsh Landing [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Percent of derivative liabilities using level 3 fair value inputs Percent of Derivative Liabilities Using Level 3 Fair Value Inputs Percent of Derivative Liabilities Using Level 3 Fair Value Inputs Number of solar leases in portfolio Number of Solar Leases in Portfolio Number of Solar Leases in Portfolio Accounts receivable, related parties Accounts Receivable, Related Parties Accounts receivable, related parties, noncurrent Accounts Receivable, Related Parties, Noncurrent Fair value assets, measured on recurring basis, valuation techniques, impact of credit reserve to fair value Fair Value Assets, Measured on Recurring Basis, Valuation Techniques, Impact of Credit Reserve to Fair Value This element represents the increase (decrease) to fair value from applying a credit reserve to reflect credit risk on the valuation techniques used to measure fair value of Level 2 and 3 derivative contracts which is calculated based on credit default swaps. Statement of Stockholders' Equity [Abstract] Schedule of Capitalization, Equity [Table] Schedule of Capitalization, Equity [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] CEG [Member] CEG [Member] CEG [Member] Tax Equity Investors [Member] Tax Equity Investors [Member] Tax Equity Investors [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Noncontrolling Interest Noncontrolling Interest [Member] Statement of Stockholders' Equity Schedule of Capitalization, Equity [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Accumulated OCL beginning balance Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Excluding Net Income Related to Drop Down Asset Acquisitions Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Excluding Net Income Related to Drop Down Asset Acquisitions Pre-acquisition net income of Buckthorn Solar Drop Down Asset Pre-acquisition net income of Acquired ROFO assets Pre-acquisition net income of Acquired ROFO assets Unrealized loss on derivatives, net of tax Unrealized Gain (Loss) on Derivatives Payment for noncontrolling interest Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Capital contributions, net of distributions, cash Noncontrolling Interest, Increase from Sale of Parent Equity Interest Distributions, net of contributions, cash Noncontrolling Interest, Increase from Subsidiary Equity Issuance Contributions, non-cash Adjustments To Additional Paid In Capital, Distributions Paid Non-Cash, Net Of Contributions Adjustments To Additional Paid In Capital, Distributions Paid Non-Cash, Net Of Contributions Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Cumulative effect from change in accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption Distributions and return of capital to NRG, net of contributions, cash Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders, Cash Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders, Cash Distributions and return of capital to NRG, net of contributions, non-cash Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders, Non-cash Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders, Non-cash Proceeds from the issuance of Class C common stock Stock Issued During Period, Value, New Issues Non-cash adjustment for change in tax basis of property, plant and equipment Adjustments to Additional Paid in Capital, Other Common stock dividends and distributions Dividends, Common Stock Accumulated OCL ending balance Unrealized (loss) gain on derivatives, income tax expense/ (benefit) Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments, Tax Nature of Business Business Description and Basis of Presentation [Text Block] Central CA Fuel Cell 1 [Member] Central CA Fuel Cell 1 [Member] Central CA Fuel Cell 1 [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Net notional volume buy/(sell) of NRG Yield's open derivative transactions broken out by commodity Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Fair value within the derivative instrument valuation on the balance sheets Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Offsetting of derivatives by counterparty master agreement level and collateral received or paid Offsetting Liabilities [Table Text Block] Effects of NRG Yield's accumulated OCI balance attributable to interest rate swaps designated as cash flow hedge derivatives, net of tax Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Derivative gains and losses Derivative Instruments, Gain (Loss) [Table Text Block] ROU Assets - operating leases Short- term lease liability - operating leases Operating Lease, Liability, Current Long- term lease liability - operating leases Total lease liability Operating Lease, Liability Cash paid for operating leases Operating Lease, Payments Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Weighted average discount rate (as a percentage) Operating Lease, Weighted Average Discount Rate, Percent Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Operating lease liabilities Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Affiliated Entity [Member] Affiliated Entity [Member] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Third Party Investor [Member] Third Party Investor [Member] Third Party Investor [Member] Clearway Energy LLC [Member] Clearway Energy LLC [Member] Clearway Energy LLC [Member] Buckthorn Renewables, LLC [Member] Buckthorn Renewables, LLC [Member] Buckthorn Renewables, LLC [Member] Kawailoa Solar Partnership LLC [Member] Kawailoa Solar Partnership LLC [Member] Kawailoa Solar Partnership LLC [Member] Other Ownership Interests Name [Axis] Other Ownership Interests Name [Axis] Other Ownership Interests, Name [Domain] Other Ownership Interests, Name [Domain] Financial Institutions [Member] Financial Institutions [Member] Represents the information pertaining to the financial institutions. Oahu Solar Partnership [Member] Oahu Solar Partnership [Member] Oahu Solar Partnership [Member] Oahu Solar, Lanikuhana [Member] Oahu Solar, Lanikuhana [Member] Oahu Solar, Lanikuhana [Member] Oahu Solar, Waipio [Member] Oahu Solar, Waipio [Member] Oahu Solar, Waipio [Member] Repowering Partnership Holdco LLC, due 2020 [Member] Repowering Partnership Holdco LLC, due 2020 [Member] Repowering Partnership Holdco LLC, due 2020 [Member] Kawailoa Partnership [Member] Kawailoa Partnership [Member] Kawailoa Partnership [Member] Zephyr Oahu Partnership LLC [Member] Zephyr Oahu Partnership LLC [Member] Zephyr Oahu Partnership LLC [Member] November 2015 Drop Down Assets [Member] November 2015 Drop Down Assets [Member] November 2015 Drop Down Assets [Member] Repowering Partnership LLC [Member] Repowering Partnership LLC [Member] Repowering Partnership LLC [Member] Kawailoa Solar Project [Member] Kawailoa Solar Project [Member] Kawailoa Solar Project [Member] Buckthorn Solar Portfolio, LLC [Member] Buckthorn Solar Portfolio, LLC [Member] Buckthorn Solar Portfolio, LLC [Member] Alta X and XI TE Holdco [Member] Alta X and XI TE Holdco [Member] Alta X and XI TE Holdco [Member] Spring Canyon [Member] Spring Canyon [Member] Spring Canyon [Member] Non-recourse construction debt Debt Instrument, Face Amount Commitment to Invest Commitment to Invest Commitment to Invest Payments to acquire businesses, gross Business combination, capital contribution, percent Business Combination, Capital Contribution, Percent Business Combination, Capital Contribution, Percent Non-recourse debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Accounts payable, related parties Accounts Payable, Related Parties Business combination, capital contribution payable, percent Business Combination, Capital Contribution Payable, Percent Business Combination, Capital Contribution Payable, Percent Percentage of cash available for distributions Percentage of Cash Available for Distributions Percentage of Cash Available for Distributions Subsidiary of limited liability company or limited partnership, ownership interest Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest Other current and non-current assets Property, plant and equipment Intangible assets Total assets Liabilities Noncontrolling interest Noncontrolling Interest in Variable Interest Entity Net assets less noncontrolling interests Net Assets Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Contract [Member] Interest Rate Contract [Member] Energy Related Derivative [Member] Energy Related Derivative [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest Expense [Member] Interest Expense [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Gain (loss) on derivatives Derivative loss Derivative, Loss on Derivative Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments [Member] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Energy Revenue [Member] Energy Revenue [Member] Energy Revenue [Member] Capacity Revenue [Member] Capacity Revenue [Member] Capacity Revenue [Member] Products And Services, Other [Member] Products And Services, Other [Member] Products And Services, Other [Member] Revenue, Related to Leases [Member] Revenue, Related to Leases [Member] Revenue, Related to Leases [Member] Conventional Generation [Member] Conventional Generation [Member] Conventional Generation [Member] Renewables [Member] Renewables [Member] Renewables [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue from contract with customer, excluding assessed tax Revenue from Contract with Customer, Excluding Assessed Tax Revenue Operating Leases, Income Statement, Contingent Revenue Lease revenue Operating Leases, Income Statement, Lease Revenue Contract amortization Capitalized Contract Cost, Amortization Mark-to-market for economic hedging activities Revenue, Mark-to-market Hedging Activities Revenue, Mark-to-market Hedging Activities Estimated Carrying Values and Fair Values Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value Option, Disclosures Fair Value Option, Disclosures [Table Text Block] Schedule of Fair Value, Assets and Liabilities Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Property Subject to or Available for Operating Lease, by Major Property Class [Table] Property Subject to or Available for Operating Lease, by Major Property Class [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Assets Leased to Others [Member] Assets Leased to Others [Member] Property Subject to or Available for Operating Lease [Line Items] Property Subject to or Available for Operating Lease [Line Items] Property, plant and equipment Property, Plant and Equipment, Gross Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Net property, plant and equipment Investments Accounted for by the Equity Method and Variable Interest Entities Equity Method Investments and Joint Ventures Disclosure [Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Underlying Asset Class [Axis] Underlying Asset Class [Axis] Underlying Asset Class [Domain] Underlying Asset Class [Domain] Power [Member] Power [Member] Details pertaining to the power, which is considered as a derivative commodity. Natural Gas [Member] Natural Gas [Member] Interest [Member] Interest [Member] Details pertaining to interest rate swaps which are considered a derivative commodity. Derivatives by Underlying Assets [Axis] Derivatives by Underlying Assets [Axis] Derivatives by the underlying asset from which its value is derived. Underlying Assets [Domain] Underlying Assets [Domain] Major types of referenced/ underlying assets. Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivative nonmonetary notional amount (energy measure) Derivative, Nonmonetary Notional Amount, Energy Measure Derivative, notional amount Derivative, Notional Amount Income Tax Disclosure [Abstract] Reconciliation of the U.S. federal statutory rate to the Company's effective rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Common Class B [Member] Common Class B [Member] Common Class D [Member] Common Class D [Member] Common Class D [Member] Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Preferred Stock, Shares Issued Preferred Stock, Shares Issued Common Stock, Shares Authorized Common Stock, Shares Authorized Common Stock, Shares, Issued Common Stock, Shares, Issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Derivative [Table] Derivative [Table] AOCI Including Portion Attributable to Noncontrolling Interest AOCI Including Portion Attributable to Noncontrolling Interest [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] Derivative [Line Items] Derivative [Line Items] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Reclassified from accumulated OCL to income due to realization of previously deferred amounts Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Mark-to-market of cash flow hedge accounting contracts Accumulated OCL ending balance, income tax benefit AOCI Including Portion Attributable to Noncontrolling Interest, Tax Losses expected to be realized from OCL during the next 12 months, net of income tax benefit of $0 Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Losses expected to be realized from OCL during the next 12 months, tax amount Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months, Tax The estimated tax impact of existing gains or losses on cash flow hedges, at the reporting date, which are expected to be reclassified to earnings within the next 12 months. Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] 2019 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total lease payments Operating Leases, Future Minimum Payments Due Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] UPMC Thermal [Member] UPMC Thermal [Member] UPMC Thermal [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] NRG [Member] NRG [Member] NRG [Member] Operations and Maintenance services [Member] Operations and Maintenance services [Member] Operations and Maintenance services [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] ESEC [Member] ESEC [Member] ESEC [Member] Thermal [Member] NRG Yield [Member] NRG Yield [Member] NRG Yield [Member] GCE Holding LLC [Member] GCE Holding LLC [Member] Represents the GCE Holding LLC GCE Holding LLC which wholly-owns GenConn Energy LLC. RENOM [Member] RENOM [Member] RENOM [Member] NRG West Coast LLC [Member] NRG West Coast LLC [Member] NRG West Coast LLC [Member] Related Party Transaction Related Party Transaction [Line Items] Expenses from transactions with related party Related Party Transaction, Expenses from Transactions with Related Party Lease period (in years) Lessor, Operating Lease, Term of Contract Renewal period (in years) Lessee, Operating Lease, Renewal Term Number of renewal options Lessee, Operating Lease, Number of Renewal Options Lessee, Operating Lease, Number of Renewal Options Revenue from related parties Revenue from Related Parties Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Letter of Credit [Member] Letter of Credit [Member] 3.5% Convertible Notes due 2019 [Member] 3.5% Convertible Notes due 2019 [Member] 3.5% Convertible Notes due 2019 [Member] 3.25% Convertible Notes due 2020 [Member] 3.25% Convertible Notes due 2020 [Member] 3.25% Convertible Notes due 2020 [Member] 5.375% Senior Notes due in 2024 [Member] 5.375% Senior Notes due in 2024 [Member] 5.375% Senior Notes due in 2024 [Member] 5.75% Senior Notes due 2025 [Member] 5.75% Senior Notes due 2025 [Member] 5.75% Senior Notes due 2025 [Member] 5.00% Senior Notes due in 2026 [Member] 5.00% Senior Notes due in 2026 [Member] 5.00% Senior Notes due in 2026 [Member] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Agua Caliente Borrower 2 [Member] Agua Caliente Borrower 2 [Member] Agua Caliente Borrower 2 [Member] Alpine Financing Agreement, due 2022 [Member] Alpine Financing Agreement, due 2022 [Member] Alpine Financing Agreement, due 2022 [Member] Alta Wind I-V, lease financing arrangement, due 2034 and 2035 [Member] Alta Wind I-V, lease financing arrangement, due 2034 and 2035 [Member] Alta Wind I-V, lease financing arrangement, due 2034 and 2035 [Member] CVSR, due 2037 [Member] CVSR Financing Agreement [Member] CVSR Financing Agreement [Member] CVSR Holdco due 2037 [Member] CVSR Holdco due 2037 [Member] CVSR Holdco due 2037 [Member] Duquesne Due 2059 [Member] Duquesne Due 2059 [Member] Duquesne Due 2059 [Member] El Segundo Energy Center, due 2023 [Member] El Segundo Energy Center, due 2023 [Member] El Segundo Energy Center, due 2023 [Member] Energy Center Minneapolis Series D, E, F, G, H Notes, due 2025-2037 [Member] Energy Center Minneapolis Series C Notes [Member] Energy Center Minneapolis Series C Notes [Member] Laredo Ridge Wind, LLC, due in 2026 [Member] Laredo Ridge Wind, LLC, due in 2026 [Member] Laredo Ridge Wind, LLC, due in 2026 [Member] Kansas South, due in 2030 [Member] Kansas South, due in 2030 [Member] Kansas South, due in 2030 [Member] Kawailoa Solar Holdings LLC, due 2026 [Member] Kawailoa Solar Holdings LLC, due 2026 [Member] Kawailoa Solar Holdings LLC, due 2026 [Member] Marsh Landing Term Loan Facility [Member] Marsh Landing Term Loan Facility [Member] Marsh Landing Term Loan Facility [Member] Oahu Solar Holdings LLC, due 2026 [Member] Oahu Solar Holdings LLC, due 2026 [Member] Oahu Solar Holdings LLC, due 2026 [Member] South Trent Wind Due 2028 [Member] South Trent Wind Due 2028 [Member] South Trent Wind Due 2028 [Member] Tapestry Wind LLC due in 2031 [Member] Tapestry Wind LLC due in 2031 [Member] Tapestry Wind LLC due in 2031 [Member] Utah Solar Portfolio, due 2022 [Member] Utah Solar Portfolio, due 2022 [Member] Utah Solar Portfolio, due 2022 [Member] Viento Funding II, Inc., due in 2023 [Member] Viento Funding II, Inc., due in 2023 [Member] Viento Funding II, Inc., due in 2023 [Member] Walnut Creek Energy, LLC, due in 2023 [Member] Walnut Creek Energy, LLC, due in 2023 [Member] Walnut Creek Energy, LLC, due in 2023 [Member] Other Debt [Member] Other Debt [Member] Represents other debt instruments not separately accounted disclosed. Project Level Debt [Member] Project Level Debt [Member] Project Level Debt [Member] Oahu Solar Holdings LLC Debt [Member] Oahu Solar Holdings LLC Debt [Member] Oahu Solar Holdings LLC Debt [Member] West Holdings Credit Agreement due 2023 Tranche A [Member] El Segundo Energy Center, due 2023 Tranche A [Member] El Segundo Energy Center, due 2023 Tranche A [Member] West Holdings Credit Agreement due 2023 Tranche B [Member] El Segundo Energy Center, due 2023 Tranche B [Member] El Segundo Energy Center, due 2023 Tranche B [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Senior notes Senior Notes Current portion of long-term debt Long-term Debt, Current Maturities Debt issuance costs, net Debt Issuance Costs, Net Debt instrument, unamortized discount Debt Instrument, Unamortized Discount Long-term debt, excluding current maturities Long-term Debt, Excluding Current Maturities Debt instrument, interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Letters of credit outstanding, amount Letters of Credit Outstanding, Amount Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Debt instrument, description of variable rate basis Debt Instrument, Description of Variable Rate Basis Remainder of 2019 Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year 2020 Lessor, Operating Lease, Payments to be Received, Two Years 2021 Lessor, Operating Lease, Payments to be Received, Three Years 2022 Lessor, Operating Lease, Payments to be Received, Four Years 2023 Lessor, Operating Lease, Payments to be Received, Five Years Total lease payments Lessor, Operating Lease, Payments to be Received Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Loans Payable [Member] Loans Payable [Member] Kawailoa Solar Holdings LLC Debt [Member] Kawailoa Solar Holdings LLC Debt [Member] Kawailoa Solar Holdings LLC Debt [Member] South Trent Wind LLC Due 2020 [Member] South Trent Wind LLC Due 2020 [Member] South Trent Wind LLC Due 2020 [Member] Tapestry Wind LLC due in 2021 [Member] Tapestry Wind LLC due in 2021 [Member] Tapestry Wind LLC due in 2021 [Member] Proceeds of debt utilized to repay related party Repayments of Related Party Debt Line of credit facility, fair value of amount outstanding Line of Credit Facility, Fair Value of Amount Outstanding Repayments of debt Repayments of Debt Due from affiliate, current Derivative, basis spread on variable rate Derivative, Basis Spread on Variable Rate Cover page. Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Line Items] Class of Stock [Line Items] Document Fiscal Year Focus Document Fiscal Year Focus Document Type Document Type Document Quarterly Report Document Quarterly Report Document Fiscal Period Focus Document Fiscal Period Focus Document Transition Report Document Transition Report Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Entity Interactive Data Current Entity Interactive Data Current Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Central Index Key Entity Central Index Key Entity File Number Entity File Number Document Period End Date Document Period End Date Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity common stock, shares outstanding Entity Common Stock, Shares Outstanding Income Taxes Income Tax Disclosure [Text Block] Commodity Contract [Member] Commodity Contract [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Fair Value, Recurring [Member] Fair Value, Recurring [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Derivative asset, fair value, gross asset Derivative Asset, Fair Value, Gross Asset Derivative liability, fair value, gross liability Derivative Liability, Fair Value, Gross Liability Derivative assets (liabilities), fair value Derivative Assets (Liabilities), at Fair Value, Net Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Beginning balance Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Purchases Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases Ending balance Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Remainder of 2019 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total lease liability Operating lease cost Operating Lease, Cost Variable lease cost Variable Lease, Cost Total lease cost Lease, Cost Schedule of long-term debt Schedule of Debt [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Basic earnings per share attributable to Clearway Energy, Inc. common stockholders Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net income (loss) attributable to Clearway Energy, Inc. Weighted average number of common shares outstanding — basic Diluted earnings per share attributable to Clearway Energy, Inc. common stockholders Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Net income attributable to Clearway Energy, Inc. Net Income (Loss) Available to Common Stockholders, Diluted Weighted average number of common shares outstanding — diluted Earnings per weighted average common share — diluted (in dollars per share) Statement of Cash Flows [Abstract] Cash Flows from Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Equity in earnings of unconsolidated affiliates Distributions from unconsolidated affiliates Proceeds from Equity Method Investment, Distribution Depreciation and amortization Depreciation, Amortization and Accretion, Net Right of use asset amortization Operating Lease, Right-of-Use Asset, Amortization Operating Lease, Right-of-Use Asset, Amortization Amortization of financing costs and debt discounts Amortization of Debt Issuance Costs and Discounts Amortization of intangibles and out-of-market contracts Amortization of Intangibles and Out of Market Contracts The aggregate (income) expense recorded in earnings to allocate the cost of out-of-market contracts and intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash (income) expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method. Adjustment for debt extinguishment Changes in deferred income taxes Increase (Decrease) in Income Taxes Changes in derivative instruments Increase (Decrease) in Derivative Assets and Liabilities Loss (gain) on disposal of asset components Gain (Loss) on Disposition of Property Plant Equipment Changes in prepaid and accrued liabilities for tolling agreements Changes in Prepaid and Accrued Capacity Payments Changes in Prepaid and Accrued Capacity Payments Changes in other working capital Increase (Decrease) in Other Operating Assets and Liabilities, Net Net Cash Provided by Operating Activities Net Cash Provided by (Used in) Operating Activities Cash Flows from Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisitions Payments to Acquire Businesses, Net of Cash Acquired Partnership interests acquisition Payments to Acquire Limited Partnership Interests Acquisition of the Drop Down Assets Payment to Acquire Business under Common Control Payment to Acquire Business under Common Control Buyout of Wind TE Holdco non-controlling interest Payments to Acquire Interest in Subsidiaries and Affiliates Capital expenditures Payments to Acquire Property, Plant, and Equipment Cash receipts from notes receivable Increase (Decrease) in Notes Receivables Return of investment from unconsolidated affiliates Proceeds from Equity Method Investment, Distribution, Return of Capital Investments in unconsolidated affiliates Payments to Acquire Businesses and Interest in Affiliates Other Payments for (Proceeds from) Other Investing Activities Net Cash Used in Investing Activities Net Cash Provided by (Used in) Investing Activities Cash Flows from Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net distributions from noncontrolling interests Proceeds from (Payments to) Noncontrolling Interests Net proceeds from the issuance of common stock under the ATM Proceeds from Issuance of Common Stock Payments of dividends and distributions Payments of Dividends Payments of debt issuance costs Payments of Debt Issuance Costs Proceeds from the revolving credit facility Proceeds from Lines of Credit Payments for the revolving credit facility Repayments of Lines of Credit Proceeds from the issuance of long-term debt Proceeds from Issuance of Long-term Debt Payments for long-term debt Repayments of Long-term Debt Net Cash Used in Financing Activities Net Cash Provided by (Used in) Financing Activities Net Decrease in Cash, Cash Equivalents and Restricted Cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, Cash Equivalents and Restricted Cash at beginning of period Cash, Cash Equivalents and Restricted Cash at end of period Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Weighted Average [Member] Weighted Average [Member] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Derivative asset Derivative Asset Derivative liability Derivative Liability Leases Lessee, Operating Leases [Text Block] Leases Lessor, Operating Leases [Text Block] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Consolidated Entities [Member] Consolidated Entities [Member] Entities that are not consolidated [Member] Entities that are not consolidated [Member] Entities that are not consolidated [Member] Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Income Tax Expense (Benefit), Continuing Operations [Abstract] Income Tax Expense (Benefit), Continuing Operations [Abstract] Loss before income tax benefit Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Outstanding antidilutive equity instruments (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Schedule of Accumulated Amortization and Depreciation Property, Plant and Equipment [Table Text Block] Dividends Declared Dividends Declared [Table Text Block] Distributions Made to Limited Liability Company (LLC) Member, by Distribution Distributions Made to Limited Liability Company (LLC) Member, by Distribution [Table Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Contract with Customer, Asset and Liability Contract with Customer, Asset and Liability [Table Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Noncontrolling Interests Consolidation, Policy [Policy Text Block] Revenue Recognition Revenue [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Segment Reporting Segment Reporting, Policy [Policy Text Block] Business Acquisitions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Long-term Debt Long-term Debt [Text Block] Lessor, Lease, Description [Table] Lessor, Lease, Description [Table] Lessor, Lease, Description [Line Items] Lessor, Lease, Description [Line Items] Summary of Significant Accounting Policies [Table] Summary of Significant Accounting Policies [Table] Summary of Significant Accounting Policies [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Customer Contracts [Member] Customer Contracts [Member] Lease Agreements [Member] Lease Agreements [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Summary of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] [Line Items] for Summary of Significant Accounting Policies [Table] Property, Plant and Equipment Accumulated Depreciation Intangible Assets Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Common stock, dividends, per share, declared Common Stock, Dividends, Per Share, Declared Distribution made to limited liability company (LLC) member, distributions paid, per unit Distribution Made to Limited Liability Company (LLC) Member, Distributions Paid, Per Unit Accounts receivable, after allowance for credit loss Accounts Receivable, after Allowance for Credit Loss Dividends payable, date declared Dividends Payable, Date Declared Dividends payable, date to be paid Dividends Payable, Date to be Paid Dividends payable, date of record Dividends Payable, Date of Record Corporate [Member] Corporate Segment [Member] Operating revenues Equity in earnings of unconsolidated affiliates Other income, net Loss on debt extinguishment Interest expense Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Reported Value Measurement [Member] Reported Value Measurement [Member] Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Long-term debt and lease obligation, including current maturities Long-term Debt and Lease Obligation, Including Current Maturities Nature of Business [Table] Nature of Business [Table] Nature of Business [Table] Clearway Energy, Inc. [Member] Clearway Energy, Inc. [Member] Clearway Energy, Inc. [Member] Conventional Generation, Utility-Scale Solar, Distributed Solar, and Wind [Member] Conventional Generation, Utility-Scale Solar, Distributed Solar, and Wind [Member] Conventional Generation, Utility-Scale Solar, Distributed Solar, and Wind [Member] Nature of Business Basis of Presentation [Line Items] Basis of Presentation [Line Items] Ownership interest (as a percentage) Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Voting Interest Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Voting Interest Ownership interest (as a percentage) Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Borrowings Due to Affiliate, Noncurrent Segment Reporting Segment Reporting Disclosure [Text Block] Interest Rate Contract Current [Member] Interest Rate Contract Current [Member] The current portion of a derivative instrument whose primary underlying risk is tied to the right to receive or pay a sum of money at a given interest rate. Interest Rate Contract Non Current [Member] Interest Rate Contract Non Current [Member] The noncurrent portion of a derivative instrument whose primary underlying risk is tied to the right to receive or pay a sum of money at a given interest rate. Commodity Contract Current [Member] Commodity Contract Current [Member] The current portion of a derivative instrument whose primary underlying risk is tied to commodity prices. Commodity Contract Non Current [Member] Commodity Contract Non Current [Member] The noncurrent portion of a derivative instrument whose primary underlying risk is tied to commodity prices. Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Derivative asset, fair value, gross liability Derivative Asset, Fair Value, Gross Liability Derivative liability, fair value, gross asset Derivative Liability, Fair Value, Gross Asset Derivative asset Derivative liability Fair value of gross derivative assets/(liabilities), net Fair Value of Gross Derivative Assets/(Liabilities), Net Fair value of gross derivative assets less fair value of gross derivative liabilities. Derivative asset fair value gross liability net of derivative liability fair value gross asset Derivative Asset Fair Value Gross Liability Net Of Derivative Liability Fair Value Gross Asset Derivative Asset Fair Value Gross Liability Net Of Derivative Liability Fair Value Gross Asset Derivative asset, fair value, amount offset against collateral net of derivative liability, fair value, amount offset against collateral Derivative Asset, Fair Value, Amount Offset Against Collateral Net Of Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative Asset, Fair Value, Amount Offset Against Collateral Net Of Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative, collateral, right to reclaim cash Derivative, Collateral, Right to Reclaim Cash Derivative, collateral, obligation to return cash Derivative, Collateral, Obligation to Return Cash