Employee Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of net periodic benefit cost:
Interest cost	$ 4.7	$ 6.4	$ 8.9
Expected return on plan assets	(6.0)	(8.0)	(9.7)
Recognized net actuarial (gain)	0.0	(0.1)	(0.1)
Amortization of prior service cost	0.0	0.1	0.1
Net periodic benefit (income)	$ (1.3)	$ (1.6)	$ (0.8)
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate	2.77%	2.24%	4.21%
Expected return on plan assets	4.10%	3.45%	5.20%