Employee Benefit Plans (Fair Value Measurements) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 221.8	$ 232.5	$ 226.6
Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5.0	4.8
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	216.8	227.7
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Money market accounts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5.0	4.8
Money market accounts | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5.0	4.8
Money market accounts | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Money market accounts | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	216.8	227.7
Mutual funds | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.0	0.0
Mutual funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	216.8	227.7
Mutual funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0.0	$ 0.0