Solar Energy Systems, Net - Components of Solar Energy Systems, Net (Detail) - Solar Energy Systems [Member] - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Property Plant And Equipment [Line Items] | ||
| Solar energy systems in service | $ 6,682 | $ 6,431 |
| Initial direct costs related to customer solar energy system lease acquisition costs | 102 | 99 |
| Solar energy systems, gross | 6,784 | 6,530 |
| Less: accumulated depreciation and amortization | (723) | (496) |
| Solar energy systems, gross, less accumulated depreciation and amortization | 6,061 | 6,034 |
| Solar energy systems under construction | 18 | 68 |
| Solar energy systems pending interconnection | 59 | 169 |
| Solar energy systems, net | $ 6,138 | $ 6,271 |