Fair Value Measurements (Details) - Financial Instruments - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Financial Instruments
Short-term securities	$ 4,766	$ 5,137
Commercial paper	100	100
Carrying Value [Member]
Financial Instruments
Short-term securities	4,766	5,137
Debt	7,933	7,931
Commercial paper	100	100
Fair Value [Member]
Financial Instruments
Short-term securities	4,766	5,137
Debt	7,095	7,645
Commercial paper	100	100
Fair Value [Member] | Level 1 [Member]
Financial Instruments
Short-term securities	1,933	1,171
Debt	0	0
Commercial paper	0	0
Fair Value [Member] | Level 2 [Member]
Financial Instruments
Short-term securities	2,788	3,912
Debt	7,095	7,645
Commercial paper	100	100
Fair Value [Member] | Level 3 [Member]
Financial Instruments
Short-term securities	45	54
Debt	0	0
Commercial paper	$ 0	$ 0