Debt (Schedule of Outstanding Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Nov. 30, 2024	Sep. 30, 2024	Mar. 31, 2024	Feb. 29, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Current portion of long-term debt	$ 519					$ 1,619
Short-term debt	519					1,619
Long-term debt	19,947					13,463
Long-term debt	19,428					11,844
Senior notes – 3.50% due 2024
Debt Instrument [Line Items]
Long-term debt	$ 0					600
Interest rate	3.50%
Senior notes – 3.875% due 2024
Debt Instrument [Line Items]
Long-term debt	$ 0					1,000
Interest rate	3.875%
Senior notes – 3.50% due 2025
Debt Instrument [Line Items]
Long-term debt	$ 500					499
Interest rate	3.50%
Senior notes – 1.349% due 2026
Debt Instrument [Line Items]
Long-term debt	$ 579					617
Interest rate	1.349%
Senior notes – 3.75% due 2026
Debt Instrument [Line Items]
Long-term debt	$ 599					599
Interest rate	3.75%
Senior notes – 4.550% due 2027
Debt Instrument [Line Items]
Long-term debt	$ 945					0
Interest rate	4.55%	4.55%
Senior notes – Floating due 2027
Debt Instrument [Line Items]
Long-term debt	$ 299					0
Senior notes – 4.375% due 2029
Debt Instrument [Line Items]
Long-term debt	$ 1,499					1,499
Interest rate	4.375%
Senior notes – 1.979% due 2030
Debt Instrument [Line Items]
Long-term debt	$ 566					601
Interest rate	1.979%
Senior notes – 2.25% due 2030
Debt Instrument [Line Items]
Long-term debt	$ 742					741
Interest rate	2.25%
Senior notes – 4.65% due 2030
Debt Instrument [Line Items]
Long-term debt	$ 991					0
Interest rate	4.65%
Senior notes – 2.375% due 2031
Debt Instrument [Line Items]
Long-term debt	$ 397					397
Interest rate	2.375%
Senior notes – 4.850% due 2031
Debt Instrument [Line Items]
Long-term debt	$ 992					0
Interest rate	4.85%	4.85%
Senior notes – 5.750% due 2032
Debt Instrument [Line Items]
Long-term debt	$ 494					493
Interest rate	5.75%
Senior notes – 5.875% due 2033
Debt Instrument [Line Items]
Long-term debt	$ 299					298
Interest rate	5.875%
Senior notes – 5.400% due 2033
Debt Instrument [Line Items]
Long-term debt	$ 593					592
Interest rate	5.40%		5.40%
Senior notes – 5.150% due 2034
Debt Instrument [Line Items]
Long-term debt	$ 495					0
Interest rate	5.15%				5.15%
Senior notes – 5.00% due 2035
Debt Instrument [Line Items]
Long-term debt	$ 1,982					0
Interest rate	5.00%
Senior notes – 4.75% due 2039
Debt Instrument [Line Items]
Long-term debt	$ 496					496
Interest rate	4.75%
Senior notes – 5.35% due 2044
Debt Instrument [Line Items]
Long-term debt	$ 495					0
Interest rate	5.35%
Senior notes – 4.35% due 2047
Debt Instrument [Line Items]
Long-term debt	$ 494					494
Interest rate	4.35%
Senior notes – 4.20% due 2048
Debt Instrument [Line Items]
Long-term debt	$ 593					593
Interest rate	4.20%
Senior notes – 4.90% due 2049
Debt Instrument [Line Items]
Long-term debt	$ 1,239					1,239
Interest rate	4.90%
Senior notes – 2.90% due 2051
Debt Instrument [Line Items]
Long-term debt	$ 346					346
Interest rate	2.90%
Senior notes – 6.25% due 2052
Debt Instrument [Line Items]
Long-term debt	$ 491					491
Interest rate	6.25%
Senior notes – 5.450% due 2053
Debt Instrument [Line Items]
Long-term debt	$ 591					591
Interest rate	5.45%			5.45%
Senior notes – 5.700% due 2053
Debt Instrument [Line Items]
Long-term debt	$ 989					988
Interest rate	5.70%		5.70%
Senior notes – 5.450% due 2054
Debt Instrument [Line Items]
Long-term debt	$ 493					0
Interest rate	5.45%				5.45%
Senior notes – 5.40% due 2055
Debt Instrument [Line Items]
Long-term debt	$ 1,479					0
Interest rate	5.40%
Mortgage – 5.70% due 2035
Debt Instrument [Line Items]
Long-term debt	$ 267					284
Interest rate	5.70%
Other
Debt Instrument [Line Items]
Long-term debt	$ 2					$ 5