Dispositions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of projects sold	$ 44,214	$ 45,223
Subsidiaries
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of projects sold	41,611	$ 42,589
Clean Energy Businesses | Subsidiaries
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of projects sold			$ 192
Gain (loss) on sale of projects	3
Gain on sale, after tax	2
Equity method investments	$ 11