Employee Benefit Plans (Fair Values of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,067.1	$ 1,366.4
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	35.1	65.0
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	396.3	551.1
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	453.1	616.9
Assets held by insurance companies and other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	182.6	133.4
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	335.6	338.6
Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	34.2	63.1
Level 1 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	42.9	53.9
Level 1 | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	181.6	211.4
Level 1 | Assets held by insurance companies and other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	76.9	10.2
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	723.7	946.2
Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.9	1.9
Level 2 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	353.4	497.2
Level 2 | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	271.5	405.5
Level 2 | Assets held by insurance companies and other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97.9	41.6
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7.8	81.6
Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Level 3 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Level 3 | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Level 3 | Assets held by insurance companies and other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 7.8	$ 81.6