Financial Instruments (Change in Fair Values) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Unrealized gain (loss) on derivatives	$ 148	$ 140	$ 1,411
Fixed Price Preemptive Rights [Member]
Derivative [Line Items]
Unrealized gain (loss) on derivatives	23	45	434
Warrant [Member]
Derivative [Line Items]
Unrealized gain (loss) on derivatives	$ 125	$ 95	$ 977