XML 53 R40.htm IDEA: XBRL DOCUMENT
v3.20.2

Summary of Significant Accounting Policies - Noncontrolling Interests (Details) - $ / shares |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Dec. 15, 2020 | Dec. 01, 2020 | Oct. 27, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020
Common Class B |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Distribution made to limited liability company (LLC) member, distributions paid, per unit (in dollars per share) |  |  |  | $ 0.3125 | $ 0.2100 | $ 0.2100
Common Class D |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Distribution made to limited liability company (LLC) member, distributions paid, per unit (in dollars per share) |  |  |  | $ 0.3125 | $ 0.2100 | $ 0.2100
Subsequent Event |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Common stock, dividends, per share, declared (in dollars per share) |  |  | $ 0.318 |  |  |
Dividends payable, date to be paid | Dec. 15, 2020 |  |  |  |  |
Dividends payable, date of record |  | Dec. 01, 2020 |  |  |  |
Clearway Energy LLC | Subsequent Event |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Dividends payable, date declared |  |  | Oct. 27, 2020 |  |  |
Common stock, dividends, per share, declared (in dollars per share) |  |  | $ 0.318 |  |  |
Dividends payable, date to be paid | Dec. 15, 2020 |  |  |  |  |
Dividends payable, date of record |  | Dec. 01, 2020 |  |  |  |

X
- Definition [Line Items] for Summary of Significant Accounting Policies [Table] + References No definition available. + Details
Name: | cwen_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | cwen_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per unit of ownership amount of cash distributions paid to unit-holder of a limited liability company (LLC). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
Name: | us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionsPaidPerUnit
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
Name: | us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the dividend to be paid was declared, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
Name: | us-gaap_DividendsPayableDateDeclaredDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=cwen_CommonClassDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=cwen_ClearwayEnergyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |