Fair Value Measurements - Fair Value Measurements (Details) - Recurring - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Financial Assets
Trading securities held in deferred compensation plan	$ 13.5	$ 12.3
Interest rate swaps	9.5	14.1
Interest rate caps	14.5	18.1
Cross-currency interest rate swaps	14.9	17.7
Foreign currency forwards		0.0
Total	52.4	62.2
Financial Liabilities
Deferred compensation plans	19.7	19.6
Cross-currency interest rate swaps	36.7	28.7
Contingent consideration	48.4	43.9
Foreign currency forwards	0.1	0.0
Total	104.9	92.2
Level 1
Financial Assets
Trading securities held in deferred compensation plan	13.5	12.3
Interest rate swaps	0.0	0.0
Interest rate caps	0.0	0.0
Cross-currency interest rate swaps	0.0	0.0
Foreign currency forwards		0.0
Total	13.5	12.3
Financial Liabilities
Deferred compensation plans	19.7	19.6
Cross-currency interest rate swaps	0.0	0.0
Contingent consideration	0.0	0.0
Foreign currency forwards	0.0	0.0
Total	19.7	19.6
Level 2
Financial Assets
Trading securities held in deferred compensation plan	0.0	0.0
Interest rate swaps	9.5	14.1
Interest rate caps	14.5	18.1
Cross-currency interest rate swaps	14.9	17.7
Foreign currency forwards		0.0
Total	38.9	49.9
Financial Liabilities
Deferred compensation plans	0.0	0.0
Cross-currency interest rate swaps	36.7	28.7
Contingent consideration	0.0	0.0
Foreign currency forwards	0.1	0.0
Total	36.8	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	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 plans	0.0	0.0
Cross-currency interest rate swaps	0.0	0.0
Contingent consideration	48.4	43.9
Foreign currency forwards	0.0	0.0
Total	$ 48.4	$ 43.9