Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Other compensation liabilities	$ 45.0	$ 48.0
Assets invested in defined contribution plans	45.0	48.0
Increase in deferred compensation liability	3.5	7.6	$ 7.6
Increase in defined contribution plan assets	3.5	7.0	7.9
Expenses in relation to qualified & non-qualified plans	$ 8.5	$ 9.0	$ 12.0