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Long-term Debt - Debt Table (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |
Long-term debt | $ 6,792 | $ 6,858
Current portion of long-term debt | (361) | (1,824)
Debt issuance costs, net | (79) | (78)
Add premiums | 5 | 0
Long-term debt, excluding current maturities | 6,357 | 4,956
2020 Convertible Notes |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 0 | 45
Debt instrument, interest rate, stated percentage | 3.25% |
2024 Senior Notes |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 0 | 88
Debt instrument, interest rate, stated percentage | 5.375% |
2025 Senior Notes |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 600 | 600
Debt instrument, interest rate, stated percentage | 5.75% |
2026 Senior Notes |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 350 | 350
Debt instrument, interest rate, stated percentage | 5.00% |
2028 Senior Notes |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 850 | 600
Debt instrument, interest rate, stated percentage | 4.75% |
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 | 2.00% |
Clearway Energy LLC and Clearway Energy Operating LLC Revolving Credit Facility, due 2023 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 0 | 0
Letters of credit outstanding, amount | 59 |
Subtotal project-level debt: |  |
Debt Instrument [Line Items] |  |
Long-term debt | 4,992 | 5,175
Alpine, due 2022 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 0 | 119
Alpine, due 2022 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 2.00% |
Alpine, due 2022 | 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] |  |
Long-term debt | $ 816 | 844
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 | $ 29 |
Buckthorn Solar, due 2025 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 127 | 129
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 | $ 26 |
Carlsbad Holdco, due 2038 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 215 | 216
Debt instrument, interest rate, stated percentage | 4.21% |
Carlsbad Holdco, due 2038 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 9 |
Carlsbad Energy Holdings LLC, due 2027 and 2038 |  |
Debt Instrument [Line Items] |  |
Long-term debt | 568 | 582
Carlsbad Energy Holdings LLC, due 2027 and 2038 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | 67 |
Chestnut Borrower, LLC, due 2024 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 109 | 0
Chestnut Borrower, LLC, due 2024 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 2.50% |
Chestnut Borrower, LLC, due 2024 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 8 |
CS4 Borrower, due 2026 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 103 | 0
CS4 Borrower, due 2026 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 2.00% |
CS4 Borrower, due 2026 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 4 |
CVSR, due 2037 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 675 | 696
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] |  |
Long-term debt | $ 176 | 182
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 |
Duquesne, due 2059 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 95 | 95
Debt instrument, interest rate, stated percentage | 4.62% |
Duquesne, due 2059 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 0 |
El Segundo Energy Center, due 2023 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 250 | 303
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 |
Energy Center Minneapolis Series D, E, F, G, H Notes, due 2025-2037 |  |
Debt Instrument [Line Items] |  |
Long-term debt | 327 | 328
Energy Center Minneapolis Series D, E, F, G, H Notes, due 2025-2037 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | 0 |
Laredo Ridge, due 2028 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 80 | 84
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 | $ 10 |
Kansas South, due 2030 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 23 | 24
Kansas South, due 2030 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 2.25% |
Kansas South, due 2030 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 2 |
Kawailoa Solar Holdings LLC, due 2026 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 82 | 82
Kawailoa Solar Holdings LLC, due 2026 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 1.375% |
Kawailoa Solar Holdings LLC, due 2026 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 13 |
Marsh Landing, due 2023 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 164 | 206
Marsh Landing, due 2023 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 2.125% |
Marsh Landing, due 2023 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 38 |
NIMH Solar, due 2024 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 193 | 0
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 | $ 11 |
Oahu Solar Holdings LLC, due 2026 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 90 | 91
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 |
Repowering Partnership Holdco LLC, due 2020 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 0 | 228
Repowering Partnership Holdco LLC, due 2020 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 0.85% |
Repowering Partnership Holdco LLC, due 2020 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 0 |
South Trent, due 2028 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 39 | 43
South Trent, due 2028 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 1.35% |
South Trent, due 2028 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 12 |
Tapestry, due 2031 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 147 | 156
Tapestry, due 2031 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 1.375% |
Tapestry, due 2031 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 18 |
Utah Solar Holdings, due 2036 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 296 | 0
Debt instrument, basis spread on variable rate | 3.59% |
Utah Solar Holdings, due 2036 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 9 |
Utah Solar Portfolio, due 2022 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 0 | 254
Utah Solar Portfolio, due 2022 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 1.625% |
Utah Solar Portfolio, due 2022 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 0 |
Viento, due 2023 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 35 | 42
Viento, due 2023 | LIBOR |  |
Debt Instrument [Line Items] |  |
Debt instrument, basis spread on variable rate | 2.00% |
Viento, due 2023 | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 12 |
Walnut Creek, due 2023 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 140 | 175
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 | $ 80 |
Other |  |
Debt Instrument [Line Items] |  |
Long-term debt | 242 | 296
Other | Letter of Credit |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding, amount | $ 29 |
Blythe |  |
Debt Instrument [Line Items] |  |
Long-term debt |  | 14
Roadrunner |  |
Debt Instrument [Line Items] |  |
Long-term debt |  | $ 28

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