Employee Benefit Plans (Net Periodic Benefit Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost			$ 3.4
Interest cost			2.6
Expected return on plan assets			0.0
Plan curtailment, settlement and termination			0.0
Amortization of prior service costs included in SG&A			0.0
Recognized net actuarial losses			0.2
Net periodic benefit cost			6.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement Of Income Or Comprehensive Income, Extensible List Not Disclosed, Flag	Interest cost	Interest cost
Other Pension, Postretirement and Supplemental Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2.1	$ 3.4
Interest cost	6.9	3.7
Expected return on plan assets	0.0	0.0
Plan curtailment, settlement and termination	0.0	(3.9)
Amortization of prior service costs included in SG&A	(0.7)	(0.6)
Recognized net actuarial losses	(1.4)	0.3
Net periodic benefit cost	6.9	2.9
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	26.6	32.6	38.6
Interest cost	63.6	36.8	31.6
Expected return on plan assets	(62.6)	(64.6)	(66.1)
Plan curtailment, settlement and termination	(3.8)	2.3	(16.5)
Amortization of prior service costs included in SG&A	2.1	0.9	0.9
Recognized net actuarial losses	(18.3)	(0.2)	1.3
Net periodic benefit cost	7.6	7.8	$ (10.2)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.1	3.4
Interest cost	$ 6.9	$ 3.7