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Financial Instruments - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Aug. 20, 2018	Sep. 12, 2017	Nov. 13, 2015	Jan. 28, 2013
Debt Instrument [Line Items]
Debt, principal amount	$ 6,650		$ 6,650		$ 6,650
Unamortized debt discount / debt issuance costs	(58)		(58)		(60)
Current portion of long-term debt	1,350		1,350		0
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	(21)		(21)		2
Long-term debt, net of discount and issuance costs	5,221		5,221		6,592
Capitalized interest	$ 6	$ 4	$ 11	$ 9
Senior Notes
Debt Instrument [Line Items]
Debt, principal amount						$ 1,500	$ 1,250	$ 1,250	$ 3,650
Senior Notes \| 3.250% 2013 senior notes due 2023
Debt Instrument [Line Items]
Interest rate percentage	3.25%		3.25%
Debt, principal amount	$ 1,350		$ 1,350		1,350
Senior Notes \| 4.500% 2015 senior notes due 2025
Debt Instrument [Line Items]
Interest rate percentage	4.50%		4.50%
Debt, principal amount	$ 750		$ 750		750
Senior Notes \| 3.000% 2017 senior notes due 2027
Debt Instrument [Line Items]
Interest rate percentage	3.00%		3.00%
Debt, principal amount	$ 750		$ 750		750
Senior Notes \| 3.900% 2018 senior notes due 2028
Debt Instrument [Line Items]
Interest rate percentage	3.90%		3.90%
Debt, principal amount	$ 500		$ 500		500
Senior Notes \| 2.000% 2020 senior notes due 2030
Debt Instrument [Line Items]
Interest rate percentage	2.00%		2.00%
Debt, principal amount	$ 750		$ 750		750
Senior Notes \| 4.700% 2013 senior notes due 2043
Debt Instrument [Line Items]
Interest rate percentage	4.70%		4.70%
Debt, principal amount	$ 1,150		$ 1,150		1,150
Senior Notes \| 3.950% 2017 senior notes due 2047
Debt Instrument [Line Items]
Interest rate percentage	3.95%		3.95%
Debt, principal amount	$ 500		$ 500		500
Senior Notes \| 4.450% 2018 senior notes due 2048
Debt Instrument [Line Items]
Interest rate percentage	4.45%		4.45%
Debt, principal amount	$ 400		$ 400		400
Senior Notes \| 3.000% 2020 senior notes due 2050
Debt Instrument [Line Items]
Interest rate percentage	3.00%		3.00%
Debt, principal amount	$ 500		$ 500		$ 500