Financial Instruments - Investment Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Equity securities, amortized cost	$ 579	$ 76
Equity securities, gross unrealized gain	455	1,431
Equity securities, gross unrealized loss	(1)	(5)
Equity securities, estimated fair value	1,033	1,502
Total, amortized cost	587	106
Total , gross unrealized gains	455	1,431
Total , gross unrealized losses	(1)	(5)
Total, estimated fair value	1,041	1,532
Net unrealized gain (loss)	(843)	1,400	$ 2
Non-U.S. debt securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, amortized cost	8	30
Debt securities, gross unrealized gains	0	0
Debt securities, gross unrealized losses	0	0
Debt securities, estimated fair value	$ 8	$ 30
Debt securities, term	1 year