Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets:
Derivative asset	$ 0.0	$ 0.0	$ 1.5
Total assets	179.2	230.7	109.2
Liabilities:
Net investment hedge liability	36.5	85.8	0.0
Deferred Compensation Plan Assets
Assets:
Plan assets	80.4	69.2	61.1
Qualified Replacement Plan Assets
Assets:
Plan assets	98.8	161.5	46.6
Level 1
Assets:
Total assets	141.9	199.4	76.5
Level 1 | Deferred Compensation Plan Assets
Assets:
Plan assets	43.1	37.9	29.9
Level 1 | Qualified Replacement Plan Assets
Assets:
Plan assets	98.8	161.5	46.6
Level 2
Assets:
Derivative asset			1.5
Total assets	37.3	31.3	32.7
Liabilities:
Net investment hedge liability	36.5	85.8
Level 2 | Deferred Compensation Plan Assets
Assets:
Plan assets	37.3	31.3	31.2
Liabilities:
Cost basis of investment funds	63.0	58.1	54.8
Level 2 | Qualified Replacement Plan Assets
Liabilities:
Cost basis of investment funds	$ 86.9	$ 159.6	$ 46.7