Solar Energy Systems, Net - Components of Solar Energy Systems, Net (Detail) - Solar Energy Systems [Member] - USD ($) $ in Millions |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Property Plant And Equipment [Line Items] | ||
| Solar energy systems in service | $ 6,758 | $ 6,682 |
| Initial direct costs related to customer solar energy system lease acquisition costs | 103 | 102 |
| Solar energy systems, gross | 6,861 | 6,784 |
| Less: accumulated depreciation and amortization | (955) | (723) |
| Solar energy systems, gross, less accumulated depreciation and amortization | 5,906 | 6,061 |
| Solar energy systems under construction | 28 | 18 |
| Solar energy systems pending interconnection | 45 | 59 |
| Solar energy systems, net | $ 5,979 | $ 6,138 |