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Borrowings - Narrative (Details) - USD ($) $ in Millions	Aug. 15, 2025	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Short-term debt		$ 1,247	$ 2,119
Proceeds from debt	$ 4,000
Senior Notes \| 5% senior notes due September 2032
Debt Instrument [Line Items]
Face amount of debt	$ 750
Stated interest rate	5.00%	5.00%
Senior Notes \| 5.45% senior notes due September 2035
Debt Instrument [Line Items]
Face amount of debt	$ 1,500
Stated interest rate	5.45%	5.45%
Senior Notes \| 6.2% senior notes due September 2055
Debt Instrument [Line Items]
Face amount of debt	$ 1,250
Stated interest rate	6.20%	6.20%
Senior Notes \| 6.25% senior notes due September 2065
Debt Instrument [Line Items]
Face amount of debt	$ 500
Stated interest rate	6.25%	6.25%
Commercial Paper
Debt Instrument [Line Items]
Short-term debt		$ 1,200	$ 2,100
Weighted average interest rate		4.64%	4.98%