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Financial Instruments (Senior Notes and Other Long-Term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Feb. 01, 2023	Dec. 31, 2022	Nov. 08, 2022	Sep. 12, 2017	Nov. 13, 2015	Jan. 28, 2013
Debt Instrument [Line Items]
Debt, principal amount	$ 6,650		$ 8,000
Current portion of long-term debt	0		1,350
Senior Notes
Debt Instrument [Line Items]
Debt, purchase price percent due to downgrade of investment grade							101.00%
Senior Notes \| 3.900% 2018 senior notes due 2028
Debt Instrument [Line Items]
Debt, principal amount	500		500
Debt, stated interest percentage rate					3.90%
Senior Notes \| 4.450% 2018 senior notes due 2048
Debt Instrument [Line Items]
Debt, principal amount	400		400
Debt, stated interest percentage rate					4.45%
Senior Notes \| 3.000% 2017 senior notes due 2027
Debt Instrument [Line Items]
Debt, principal amount	750		750
Debt, stated interest percentage rate					3.00%
Senior Notes \| 3.950% 2017 senior notes due 2047
Debt Instrument [Line Items]
Debt, principal amount	500		500
Debt, stated interest percentage rate					3.95%
Senior Notes \| Senior Notes 2.000% Due 2030
Debt Instrument [Line Items]
Debt, principal amount	750		750
Debt, stated interest percentage rate					2.00%
Senior Notes \| Senior Notes 3.000% Due 2050
Debt Instrument [Line Items]
Debt, principal amount	500		500
Senior Notes \| 3.250% 2013 senior notes due 2023
Debt Instrument [Line Items]
Debt, principal amount	0	$ 1,350	1,350
Debt, stated interest percentage rate							3.25%
Senior Notes \| 4.500% 2015 senior notes due 2025
Debt Instrument [Line Items]
Debt, principal amount	750		750
Debt, stated interest percentage rate						4.50%
Senior Notes \| 4.700% 2013 senior notes due 2043
Debt Instrument [Line Items]
Debt, principal amount	1,150		1,150
Debt, stated interest percentage rate							4.70%
Senior Notes \| 2022 Senior Notes
Debt Instrument [Line Items]
Debt, principal amount				$ 1,350
Debt, unamortized discount				$ 2
Senior Notes \| 5.600% Senior Notes Due 2032
Debt Instrument [Line Items]
Debt, principal amount	750		750
Debt, stated interest percentage rate				5.60%
Senior Notes \| 5.400% Senior Notes Due 2025
Debt Instrument [Line Items]
Debt, principal amount	$ 600		$ 600
Debt, stated interest percentage rate				5.40%