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Variable Interest Entities - Net Assets (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Noncontrolling interest | $ 249 | $ 218
Great Valley Solar |  |
Variable Interest Entity [Line Items] |  |
Non-utility property, less accumulated depreciation | 282 | 284
Other assets | 40 | 39
Total assets | 322 | 323
Term Loan | 0 | 0
Other liabilities | 13 | 13
Total liabilities | 13 | 13
Accumulated depreciation | 20 | 18
Great Valley Solar | Tax Equity Investors |  |
Variable Interest Entity [Line Items] |  |
Noncontrolling interest | 85 | 82
Copper Mountain - Mesquite Solar |  |
Variable Interest Entity [Line Items] |  |
Non-utility property, less accumulated depreciation | 442 | 446
Other assets | 174 | 176
Total assets | 616 | 622
Term Loan | 0 | 0
Other liabilities | 73 | 71
Total liabilities | 73 | 71
Accumulated depreciation | 33 | 30
Copper Mountain - Mesquite Solar | Tax Equity Investors |  |
Variable Interest Entity [Line Items] |  |
Noncontrolling interest | 130 | $ 134
CED Nevada Virginia |  |
Variable Interest Entity [Line Items] |  |
Non-utility property, less accumulated depreciation | 583 |
Other assets | 45 |
Total assets | 628 |
Term Loan | 466 |
Other liabilities | 81 |
Total liabilities | 547 |
Noncontrolling interest | $ 33 |

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