Financing Agreement - Summary of Activity Under Credit Arrangements, Excluding Acquired Borrowings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
Total borrowings as of December 31	$ 2,032.0	$ 1,858.2	$ 1,990.9
Average outstanding borrowings during year	2,175.5	2,159.3	2,074.9
Maximum outstanding borrowings during year	$ 2,329.3	$ 2,386.6	$ 2,300.0
Weighted-average interest rate as of December 31	5.77%	5.67%	5.33%