Retirement Plans - Reconciliation of Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Interest cost	$ 7.4		$ 6.2		$ 8.8
Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	314.0	[1]	325.6
Interest cost	7.4		6.2
Actuarial gain	(67.0)		(0.4)
Benefits paid	(17.3)		(17.4)
Benefit obligation at end of year	237.1	[1]	314.0	[1]	325.6
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	273.1		274.9
Actual return on assets	(63.7)		14.4
Employer contributions	1.4		1.2
Benefits paid	(17.3)		(17.4)
Fair value of plan assets at end of year	193.5		273.1		274.9
Under funded status at end of year	(43.6)		(40.9)
Other Postretirement Benefit Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	1.6	[1]	1.8
Interest cost	0.0		0.0
Actuarial gain	(0.2)		0.0
Benefits paid	(0.2)		(0.2)
Benefit obligation at end of year	1.2	[1]	1.6	[1]	1.8
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0.0		0.0
Actual return on assets	0.0		0.0
Employer contributions	0.2		0.2
Benefits paid	(0.2)		(0.2)
Fair value of plan assets at end of year	0.0		0.0		$ 0.0
Under funded status at end of year	$ (1.2)		$ (1.6)

[1] As the Company’s defined benefit plan is frozen and participants do not earn additional service benefits, the projected benefit obligation and accumulated benefit obligation are the same.