Hedging Activities, Derivative Instruments and Fair Value Measurements - Fair Value Measurements (Details) - Recurring - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Financial Assets
Trading securities held in deferred compensation plan	$ 11.3	$ 12.0
Interest rate swaps	13.4
Interest rate caps	18.5
Cross-currency interest rate swaps	66.3
Foreign currency forwards	0.4	0.0
Total	109.9	12.0
Financial Liabilities
Deferred compensation plans	18.3	22.4
Foreign currency forwards		0.2
Total	18.3	22.6
Level 1
Financial Assets
Trading securities held in deferred compensation plan	11.3	12.0
Interest rate swaps	0.0
Interest rate caps	0.0
Cross-currency interest rate swaps	0.0
Foreign currency forwards	0.0	0.0
Total	11.3	12.0
Financial Liabilities
Deferred compensation plans	18.3	22.4
Foreign currency forwards		0.0
Total	18.3	22.4
Level 2
Financial Assets
Trading securities held in deferred compensation plan	0.0	0.0
Interest rate swaps	13.4
Interest rate caps	18.5
Cross-currency interest rate swaps	66.3
Foreign currency forwards	0.4	0.0
Total	98.6	0.0
Financial Liabilities
Deferred compensation plans	0.0	0.0
Foreign currency forwards		0.2
Total	0.0	0.2
Level 3
Financial Assets
Trading securities held in deferred compensation plan	0.0	0.0
Interest rate swaps	0.0
Interest rate caps	0.0
Cross-currency interest rate swaps	0.0
Foreign currency forwards	0.0	0.0
Total	0.0	0.0
Financial Liabilities
Deferred compensation plans	0.0	0.0
Foreign currency forwards		0.0
Total	$ 0.0	$ 0.0