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Variable Interest Entities - Net Assets (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Business Acquisition [Line Items] |  |
Noncontrolling interest | $ 299 | $ 218
Great Valley Solar |  |
Business Acquisition [Line Items] |  |
Non-utility property, less accumulated depreciation | 275 | 284
Other assets | 37 | 39
Total assets | 312 | 323
Other liabilities | 14 | 13
Total liabilities | 14 | 13
Accumulated depreciation | 26 | 18
Copper Mountain Solar - Mesquite Solar |  |
Business Acquisition [Line Items] |  |
Non-utility property, less accumulated depreciation | 431 | 446
Other assets | 167 | 176
Total assets | 598 | 622
Other liabilities | 74 | 71
Total liabilities | 74 | 71
Accumulated depreciation | 44 | 30
CED Nevada Virginia |  |
Business Acquisition [Line Items] |  |
Non-utility property, less accumulated depreciation | 643 |
Other assets | 55 |
Total assets | 698 |
Other liabilities | 315 |
Total liabilities | 315 |
Accumulated depreciation | 10 |
Tax Equity Investors |  |
Business Acquisition [Line Items] |  |
Noncontrolling interest | 95 |
Tax Equity Investors | Great Valley Solar |  |
Business Acquisition [Line Items] |  |
Noncontrolling interest | 84 | 82
Tax Equity Investors | Copper Mountain Solar - Mesquite Solar |  |
Business Acquisition [Line Items] |  |
Noncontrolling interest | $ 118 | $ 134

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