Debt - Components (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Short-term debt:
Total short-term debt	$ 900	$ 822
Long-term debt:
Senior notes, net	7,931	8,329
Other long-term debt, net	55	69
Total long-term debt	7,986	8,398
Total debt	8,886	9,220
Senior notes
Long-term debt:
Senior notes, net	7,931	8,329
Unamortized discounts and debt issuance costs	52	54
Debt instrument face value	8,400	9,100
Other
Long-term debt:
Other long-term debt, net	55	69
Level 2 | Senior notes
Long-term debt:
Debt instrument fair value	8,400	9,900
Other
Short-term debt:
Total short-term debt	118	72
Commercial Paper | Line of Credit
Short-term debt:
Short-term debt	$ 382	0
Weighted average interest rate, short-term	0.80%
3.65% senior notes due June 2022 | Senior notes
Short-term debt:
Total short-term debt	$ 0	$ 750
Stated percentage	3.65%	3.65%
2.85% senior notes due January 2023 | Senior notes
Short-term debt:
Total short-term debt	$ 400	$ 0
Stated percentage	2.85%