Benefit Plans - Pension and Other Post-retirement Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan assets	$ 34.4	$ 33.7
Pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation	116.1	120.8	$ 112.1
Plan assets	34.4	33.7	31.0
Company contributions	8.1	7.1
Other post-retirement plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation	11.3	13.8	14.6
Plan assets	0.0	0.0	$ 0.0
Company contributions	$ 1.3	$ 1.3
Restricted Stock And Restricted Stock Units (RSUs) [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Vesting period	3 years