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Long-term Debt - Schedule of Debt (Details) - USD ($)
$ in Millions
6 Months Ended
May 03, 2022
Mar. 16, 2022
Jun. 30, 2022
Dec. 31, 2021
Debt Instrument [Line Items]        
Total debt     $ 7,127 $ 7,778
Less current maturities     (457) (772)
Less net debt issuance costs     (69) (71)
Add premiums     4 4
Total long-term debt     6,605 6,939
2028 Senior Notes        
Debt Instrument [Line Items]        
Total debt     $ 850 850
Debt instrument, interest rate, stated percentage     4.75%  
2031 Senior Notes        
Debt Instrument [Line Items]        
Total debt     $ 925 925
Debt instrument, interest rate, stated percentage     3.75%  
2032 Senior Notes        
Debt Instrument [Line Items]        
Total debt     $ 350 350
Debt instrument, interest rate, stated percentage     3.75%  
Clearway Energy LLC and Clearway Energy Operating LLC Revolving Credit Facility, due 2023        
Debt Instrument [Line Items]        
Total debt     $ 0 245
Repayments of debt $ 305      
Clearway Energy LLC and Clearway Energy Operating LLC Revolving Credit Facility, due 2023 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.75%  
Clearway Energy LLC and Clearway Energy Operating LLC Revolving Credit Facility, due 2023 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 87  
Bridge Loan, Due 2022        
Debt Instrument [Line Items]        
Total debt     $ 0 335
Repayments of debt $ 335      
Bridge Loan, Due 2022 | SOFR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.25%  
Bridge Loan, Due 2022 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount      
Subtotal project-level debt:        
Debt Instrument [Line Items]        
Total debt     5,002 5,073
Agua Caliente Solar LLC, due 2037        
Debt Instrument [Line Items]        
Total debt     $ 677 684
Agua Caliente Solar LLC, due 2037 | Minimum        
Debt Instrument [Line Items]        
Debt instrument, interest rate, stated percentage     239.50%  
Agua Caliente Solar LLC, due 2037 | Maximum        
Debt Instrument [Line Items]        
Debt instrument, interest rate, stated percentage     363.30%  
Agua Caliente Solar LLC, due 2037 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 45  
Alta Wind Asset Management LLC, due 2031        
Debt Instrument [Line Items]        
Total debt     $ 12 13
Alta Wind Asset Management LLC, due 2031 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, interest rate, stated percentage     2.625%  
Alta Wind Asset Management LLC, due 2031 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 0  
Alta Wind I-V lease financing arrangements, due 2034 and 2035        
Debt Instrument [Line Items]        
Total debt     $ 727 756
Alta Wind I-V lease financing arrangements, due 2034 and 2035 | Minimum        
Debt Instrument [Line Items]        
Debt instrument, interest rate, stated percentage     5.696%  
Alta Wind I-V lease financing arrangements, due 2034 and 2035 | Maximum        
Debt Instrument [Line Items]        
Debt instrument, interest rate, stated percentage     7.015%  
Alta Wind I-V lease financing arrangements, due 2034 and 2035 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 22  
Alta Wind Realty Investments LLC, due 2031        
Debt Instrument [Line Items]        
Total debt     $ 23 24
Debt instrument, interest rate, stated percentage     7.00%  
Alta Wind Realty Investments LLC, due 2031 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 0  
Borrego, due 2024 and 2038        
Debt Instrument [Line Items]        
Total debt     54 54
Borrego, due 2024 and 2038 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     0  
Buckthorn Solar, due 2025        
Debt Instrument [Line Items]        
Total debt     $ 122 123
Buckthorn Solar, due 2025 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.75%  
Buckthorn Solar, due 2025 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 23  
Carlsbad Energy Holdings LLC, due 2027        
Debt Instrument [Line Items]        
Total debt     $ 136 136
Carlsbad Energy Holdings LLC, due 2027 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.75%  
Carlsbad Energy Holdings LLC, due 2027 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 82  
Carlsbad Energy Holdings LLC, due 2038        
Debt Instrument [Line Items]        
Total debt     $ 407 407
Debt instrument, interest rate, stated percentage     4.12%  
Carlsbad Energy Holdings LLC, due 2038 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 0  
Carlsbad Holdco, due 2038        
Debt Instrument [Line Items]        
Total debt     $ 203 205
Debt instrument, interest rate, stated percentage     4.21%  
Carlsbad Holdco, due 2038 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 10  
CVSR, due 2037        
Debt Instrument [Line Items]        
Total debt     $ 638 652
CVSR, due 2037 | Minimum        
Debt Instrument [Line Items]        
Debt instrument, interest rate, stated percentage     2.339%  
CVSR, due 2037 | Maximum        
Debt Instrument [Line Items]        
Debt instrument, interest rate, stated percentage     3.775%  
CVSR, due 2037 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 0  
CVSR Holdco Notes, due 2037        
Debt Instrument [Line Items]        
Total debt     $ 160 169
Debt instrument, interest rate, stated percentage     4.68%  
CVSR Holdco Notes, due 2037 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 13  
DG-CS Master Borrower LLC, due 2040        
Debt Instrument [Line Items]        
Total debt     $ 434 441
Debt instrument, interest rate, stated percentage     3.51%  
DG-CS Master Borrower LLC, due 2040 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 30  
El Segundo Energy Center, due 2023        
Debt Instrument [Line Items]        
Total debt     $ 154 193
El Segundo Energy Center, due 2023 | Minimum | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.875%  
El Segundo Energy Center, due 2023 | Maximum | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     2.50%  
El Segundo Energy Center, due 2023 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 138  
Kawailoa Solar Portfolio LLC, due 2026        
Debt Instrument [Line Items]        
Total debt     $ 78 78
Kawailoa Solar Portfolio LLC, due 2026 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.375%  
Kawailoa Solar Portfolio LLC, due 2026 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 15  
Laredo Ridge, due 2028        
Debt Instrument [Line Items]        
Total debt     $ 0 72
Laredo Ridge, due 2028 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     2.125%  
Laredo Ridge, due 2028 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 0  
Marsh Landing, due 2023        
Debt Instrument [Line Items]        
Total debt     $ 65 84
Marsh Landing, due 2023 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     2.375%  
Marsh Landing, due 2023 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 73  
Mililani I, due 2022 and 2024        
Debt Instrument [Line Items]        
Total debt     $ 98 0
Mililani I, due 2022 and 2024 | Minimum | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.00%  
Mililani I, due 2022 and 2024 | Maximum | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.25%  
Mililani I, due 2022 and 2024 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 2  
NIMH Solar, due 2024        
Debt Instrument [Line Items]        
Total debt     $ 171 176
NIMH Solar, due 2024 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     2.00%  
NIMH Solar, due 2024 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 16  
Oahu Solar Holdings LLC, due 2026        
Debt Instrument [Line Items]        
Total debt     $ 85 86
Oahu Solar Holdings LLC, due 2026 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.375%  
Oahu Solar Holdings LLC, due 2026 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 11  
Rosie Class B LLC, due 2027        
Debt Instrument [Line Items]        
Total debt     $ 78 78
Rosie Class B LLC, due 2027 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.75%  
Rosie Class B LLC, due 2027 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 17  
Tapestry Wind LLC, due 2031        
Debt Instrument [Line Items]        
Total debt     $ 0 85
Tapestry Wind LLC, due 2031 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.375%  
Tapestry Wind LLC, due 2031 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 0  
Utah Solar Holdings, due 2036        
Debt Instrument [Line Items]        
Total debt     $ 267 273
Debt instrument, interest rate, stated percentage     3.59%  
Utah Solar Holdings, due 2036 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 15  
Viento Funding II, LLC Due 2023 and 2029        
Debt Instrument [Line Items]        
Total debt   $ 190 $ 188 29
Viento Funding II, LLC Due 2023 and 2029 | SOFR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     0.10%  
Viento Funding II, LLC Due 2023 and 2029 | SOFR and Applicable Margin        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.475%  
Viento Funding II, LLC Due 2023 and 2029 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 26  
Walnut Creek, due 2023        
Debt Instrument [Line Items]        
Total debt     $ 55 74
Walnut Creek, due 2023 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     1.75%  
Walnut Creek, due 2023 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 133  
WCEP Holdings, LLC, due 2023        
Debt Instrument [Line Items]        
Total debt     $ 28 30
WCEP Holdings, LLC, due 2023 | LIBOR        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     3.00%  
WCEP Holdings, LLC, due 2023 | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 0  
Other        
Debt Instrument [Line Items]        
Total debt     142 $ 151
Other | Letter of Credit        
Debt Instrument [Line Items]        
Letters of credit outstanding, amount     $ 191  
Laredo Ridge, Due 2028; Tapestry Wind, LLC, Due 2031; and Viento Funding II, LLC, Due 2023        
Debt Instrument [Line Items]        
Repayments of debt   $ 186