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v3.20.2

Long-term Debt - Recourse Debt (Details) | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2020 CAD ($) | Jun. 30, 2020 USD ($) | Mar. 11, 2020 USD ($) | Dec. 31, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |
Debt amount | $ 5,929,000,000 |  |  |  |  | $ 6,042,000,000
Recourse Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt amount | 5,925,000,000 |  |  |  |  | 6,008,000,000
Recourse Debt | Tax-exempt bonds |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt amount | $ 466,000,000 |  |  |  |  | 466,000,000
Debt issuance amount |  |  |  |  | $ 59,000,000 |
Recourse Debt | Dunkirk Power LLC Tax Exempt Bonds Due 2042 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.875% |  | 5.875% |  |  |
Revolving Credit Facility | Line of Credit | Revolver Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt amount | $ 0 |  |  |  |  | $ 83,000,000
Increase revolving commitments | 802,000,000 |  |  |  |  |
Revolving credit commitments | $ 273,000,000 |  |  |  |  |
Debt term | 30 months |  |  |  |  |
Debt extension, term | 12 months |  |  |  |  |
Credit facility, lien basket (greater than) | $ 10,000,000,000 |  |  | $ 6,000,000,000 |  |
Credit facilities, percentage of total assets | 30.00% |  | 30.00% | 30.00% |  |
Revolving Credit Facility | Line of Credit | Revolver Facility | Forecast |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total revolving commitments available |  | $ 3,700,000,000 |  |  |  |
Bridge Loan | Line of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Revolving credit commitments | $ 100,000,000 |  | $ 10,000,000 | $ 50,000,000 |  |
Debt Basket | Revolver Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Revolving credit commitments | 600,000,000 |  |  |  |  |
Debt Basket | Line of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Revolving credit commitments | 10,000,000,000 |  |  | 6,000,000,000 |  |
Debt Basket | Secured Debt | Revolver Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Revolving credit commitments | $ 1,700,000,000 |  |  | $ 750,000,000 |  |

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