Financial Instruments - Senior Notes Offering and Other Long-Term Debt (Details) - Senior Notes - USD ($) $ in Millions	Sep. 30, 2025	Aug. 18, 2025	Nov. 08, 2022	Jan. 28, 2013
Debt Instrument [Line Items]
Debt, purchase price percent due to downgrade of investment grade				101.00%
4.150% 2025 senior notes due 2028
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 850
Interest rate percentage	4.15%
5.000% 2025 senior notes due 2035
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 1,000
Interest rate percentage			5.00%
5.400% 2022 senior notes due 2025
Debt Instrument [Line Items]
Interest rate percentage			5.40%
Debt Instrument, Repurchased Face Amount		$ 600
4.500% 2015 senior notes due 2025
Debt Instrument [Line Items]
Interest rate percentage	4.50%
Debt Instrument, Repurchased Face Amount		750
Senior Notes Due 2025
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount		$ 2