Solar Energy Systems, Net - Components of Solar Energy Systems, Net (Detail) - Solar Energy Systems [Member] - USD ($) $ in Millions |
Mar. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Property Plant And Equipment [Line Items] | ||
| Solar energy systems in service | $ 6,703 | $ 6,682 |
| Initial direct costs related to customer solar energy system lease acquisition costs | 102 | 102 |
| Solar energy systems, gross | 6,805 | 6,784 |
| Less: accumulated depreciation and amortization | (781) | (723) |
| Solar energy systems, gross, less accumulated depreciation and amortization | 6,024 | 6,061 |
| Solar energy systems under construction | 24 | 18 |
| Solar energy systems pending interconnection | 58 | 59 |
| Solar energy systems, net | $ 6,106 | $ 6,138 |