Debt - Commercial Paper Program (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Commercial Paper
Debt Instrument
Borrowings	$ 368,000,000		$ 368,000,000
Senior Unsecured Notes
Debt Instrument
Weighted-average interest rate (as a percent)	4.16%		4.16%
Commercial Paper Program
Debt Instrument
Maximum outstanding amount capacity	$ 2,000,000,000		$ 2,000,000,000		$ 2,000,000,000
Amortization of debt issuance costs	$ 2,000,000	$ 2,000,000	$ 7,000,000	$ 7,000,000
Borrowings					$ 150,000,000
Debt instrument, term (in months)			22 days		25 days
Weighted-average interest rate (as a percent)	4.36%		4.36%		4.65%