Fair Value Measurements - Fair Value Measurements (Details) - Recurring - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financial Assets
Trading securities held in deferred compensation plan	$ 16.8	$ 12.3
Interest rate swaps	9.4	14.1
Interest rate caps		18.1
Cross-currency interest rate swaps	15.7	17.7
Foreign currency forwards		0.0
Total	41.9	62.2
Financial Liabilities
Deferred compensation plan	24.7	19.6
Cross-currency interest rate swaps	63.1	28.7
Contingent consideration	42.2	43.9
Foreign currency forwards		0.0
Total	130.0	92.2
Level 1
Financial Assets
Trading securities held in deferred compensation plan	16.8	12.3
Interest rate swaps	0.0	0.0
Interest rate caps		0.0
Cross-currency interest rate swaps	0.0	0.0
Foreign currency forwards		0.0
Total	16.8	12.3
Financial Liabilities
Deferred compensation plan	24.7	19.6
Cross-currency interest rate swaps	0.0	0.0
Contingent consideration	0.0	0.0
Foreign currency forwards		0.0
Total	24.7	19.6
Level 2
Financial Assets
Trading securities held in deferred compensation plan	0.0	0.0
Interest rate swaps	9.4	14.1
Interest rate caps		18.1
Cross-currency interest rate swaps	15.7	17.7
Foreign currency forwards		0.0
Total	25.1	49.9
Financial Liabilities
Deferred compensation plan	0.0	0.0
Cross-currency interest rate swaps	63.1	28.7
Contingent consideration	0.0	0.0
Foreign currency forwards		0.0
Total	63.1	28.7
Level 3
Financial Assets
Trading securities held in deferred compensation plan	0.0	0.0
Interest rate swaps	0.0	0.0
Interest rate caps		0.0
Cross-currency interest rate swaps	0.0	0.0
Foreign currency forwards		0.0
Total	0.0	0.0
Financial Liabilities
Deferred compensation plan	0.0	0.0
Cross-currency interest rate swaps	0.0	0.0
Contingent consideration	42.2	43.9
Foreign currency forwards		0.0
Total	$ 42.2	$ 43.9