Debt - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended
	Mar. 31, 2025	Jan. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Secured Debt
Debt Instrument [Line Items]
Outstanding borrowings	$ 0		$ 0
Credit Facility | Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	2,500,000,000		2,500,000,000
Unused borrowing capacity	$ 2,500,000,000		$ 2,500,000,000
Credit spread adjustment			0.10%
Credit Facility | Credit Facility | Federal Funds Effective Rate
Debt Instrument [Line Items]
Variable rate percentage			0.50%
Credit Facility | Credit Facility | SOFR
Debt Instrument [Line Items]
Variable rate percentage			1.00%
Credit Facility | Credit Facility | Maximum
Debt Instrument [Line Items]
Ratio of indebtedness to net capital	0.65		0.65
Variable rate percentage			1.875%
Unused capacity, commitment fee percentage			0.275%
Credit Facility | Credit Facility | Maximum | S O F R One Month Period Additional Applicable Margin
Debt Instrument [Line Items]
Variable rate percentage			0.875%
Credit Facility | Credit Facility | Minimum
Debt Instrument [Line Items]
Variable rate percentage			1.25%
Unused capacity, commitment fee percentage			0.15%
Credit Facility | Credit Facility | Minimum | S O F R One Month Period Additional Applicable Margin
Debt Instrument [Line Items]
Variable rate percentage			0.25%
Credit Facility | Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 500,000,000		$ 500,000,000
Credit Facility | Credit Facility | Swingline Loans
Debt Instrument [Line Items]
Maximum borrowing capacity	50,000,000		50,000,000
4.95% senior notes due 2025 | Senior Notes
Debt Instrument [Line Items]
Outstanding borrowings	$ 0		$ 0	$ 389,000,000
Extinguishment of debt		$ 389,000,000
Interest rate, stated percentage	4.95%	4.95%	4.95%
5.50% senior notes due 2026 | Senior Notes
Debt Instrument [Line Items]
Outstanding borrowings	$ 0		$ 0	$ 47,000,000
Extinguishment of debt	$ 47,000,000
Interest rate, stated percentage	5.50%		5.50%