Benefit Plans Benefit Plans - Accumulated Benefit Obligation In Excess of Plan Assets (Details) - Pension Benefits - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 315.6	$ 426.5
Accumulated benefit obligation	295.2	409.7
Fair value of plan assets	360.0	340.9
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	570.0	522.2
Accumulated benefit obligation	570.0	522.2
Fair value of plan assets	$ 427.8	$ 346.0