Solar Energy Systems, Net - Components of Solar Energy Systems, Net (Parenthetical) (Details) - Solar Energy Systems [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finance Leased Assets [Line Items]
Depreciation and amortization expense	$ 236	$ 232	$ 227
Gross finance leased assets	36	36
Accumulated depreciation and amortization on finance leased assets	9	7
Gross solar energy system under lease pass through fund arrangement	1,020	1,050
Gross solar energy Systems under lease pass through fund arrangement accumulated depreciation	$ 165	$ 137