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v3.20.2

Long-term Debt - Schedule of Long-term Debt (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2020 $ / shares | Dec. 31, 2019 USD ($) | Jun. 30, 2020 USD ($) | Mar. 11, 2020
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | $ 6,042 | $ 5,957 |
Long-term Debt, Current Maturities |  | (88) | (7) |
Less debt issuance costs |  | (65) | (61) |
Discounts |  | (86) | (79) |
Long-term debt |  | 5,803 | 5,810 |
Recourse Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | 6,008 | 5,925 |
Recourse Debt | Senior Notes, due 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | 1,000 | $ 1,000 |
Interest rate, stated percentage |  |  | 7.25% |
Recourse Debt | Senior Notes, due 2027 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | 1,230 | $ 1,230 |
Interest rate, stated percentage |  |  | 6.625% |
Recourse Debt | Senior Notes, due 2028 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | 821 | $ 821 |
Interest rate, stated percentage |  |  | 5.75% |
Recourse Debt | Senior Notes, due 2029 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | 733 | $ 733 |
Interest rate, stated percentage |  |  | 5.25% |
Recourse Debt | Convertible Senior Notes Due 2048 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | 575 | $ 575 |
Interest rate, stated percentage |  |  | 2.75% |
Recourse Debt | Convertible Senior Notes Due 2048 | Subsequent Event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Convertible Notes, conversion price (in usd per share) | $ / shares | $ 46.65 |  |  |
Conversion rate | 0.02144 |  |  |
Recourse Debt | Senior Secured First Lien Notes, due 2024 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | 600 | $ 600 |
Interest rate, stated percentage |  |  | 3.75% |
Recourse Debt | Senior Secured First Lien Notes, due 2029 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | 500 | $ 500 |
Interest rate, stated percentage |  |  | 4.45% |
Recourse Debt | Tax-exempt bonds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | 466 | $ 466 |
Recourse Debt | Tax-exempt bonds | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 1.30% | 1.30%
Recourse Debt | Tax-exempt bonds | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  | 6.00% |
Line of Credit | Revolving Credit Facility | Revolver Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | $ 83 | $ 0 |
Line of Credit | Revolving Credit Facility | Revolver Facility | LIBOR |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate |  | 1.75% |  |
Non Recourse Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | $ 34 | 32 |
Non Recourse Debt | Other |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | $ 34 | $ 32 |

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