Solar Energy Systems, Net - Components of Solar Energy Systems, Net (Details) - Solar Energy Systems [Member] - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Solar energy systems in service		$ 6,809	$ 6,758
Initial direct costs related to customer solar energy system lease acquisition costs		104	103
Solar energy systems, gross		6,913	6,861
Less: accumulated depreciation and amortization	[1]	(1,187)	(955)
Solar energy systems, gross, less accumulated depreciation and amortization		5,726	5,906
Solar energy systems under construction		18	28
Solar energy systems pending interconnection		21	45
Solar energy systems, net	[2],[3]	$ 5,765	$ 5,979

[1] Depreciation and amortization expense during the years ended December 31, 2021, 2020 and 2019 was $236 million, $232 million and $227 million, respectively.

[2] As of December 31, 2021 and 2020, solar energy systems, net, included $36 million of gross finance leased assets with accumulated depreciation and amortization of $9 million and $7 million, respectively.

[3] As of December 31, 2021 and 2020, there were $1.02 billion and $1.05 billion, respectively, of gross solar energy systems under lease pass-through fund arrangements with accumulated depreciation of $165 million and $137 million, respectively.