Borrowings - Senior Credit Facility (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Borrowings under credit facilities	$ 0	$ 0	$ 70,000,000.0
Interest	123,800,000	110,400,000	113,300,000
Revolving Credit Facililty
Line of Credit Facility [Line Items]
Borrowing capacity	$ 1,000,000,000
Interest rate at end of period	6.45%
Outstanding borrowing	$ 0
Borrowings under credit facilities	0	0
Interest	$ 0	$ 0	$ 0
Revolving Credit Facililty | Base Rate
Line of Credit Facility [Line Items]
Applicable margin over base rate	0.50%
Revolving Credit Facililty | SOFR
Line of Credit Facility [Line Items]
Applicable margin over base rate	0.10%
Revolving Credit Facililty | SOFR | Maximum
Line of Credit Facility [Line Items]
Applicable margin over base rate	1.50%