Long-Term Debt - U.K. Credit Agreement (Details) £ in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2024 GBP (£)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Outstanding debt | $	$ 1,766.3		$ 1,629.2
U.K. credit agreement — revolving credit line
Debt Instrument [Line Items]
Maximum credit available		£ 200.0
Additional facility capacity under accordion feature		100.0
Outstanding debt	$ 118.9	£ 94.0	$ 0.0
U.K. credit agreement — revolving credit line | Minimum
Debt Instrument [Line Items]
Line of credit basis spread on variable rate, increase (decrease) (as a percent)	1.10%
U.K. credit agreement — revolving credit line | Maximum
Debt Instrument [Line Items]
Line of credit basis spread on variable rate, increase (decrease) (as a percent)	2.10%