Pension Benefit Plans (Benefit Payments That Reflect Expected Future Service) (Details) - Pension benefit plans $ in Millions	Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Expected future benefit payments, next 12 months	$ 222.5
Expected future benefit payments, in year two	226.5
Expected future benefit payments, in year three	225.9
Expected future benefit payments, in year four	228.4
Expected future benefit payments, in year five	230.5
Expected future benefit payments, thereafter	1,123.4
Non-U.S. plan
Defined Benefit Plan Disclosure [Line Items]
Expected future benefit payments, next 12 months	50.2
Expected future benefit payments, in year two	52.4
Expected future benefit payments, in year three	51.1
Expected future benefit payments, in year four	54.1
Expected future benefit payments, in year five	56.3
Expected future benefit payments, thereafter	308.7
United States | Domestic plan
Defined Benefit Plan Disclosure [Line Items]
Expected future benefit payments, next 12 months	172.3
Expected future benefit payments, in year two	174.1
Expected future benefit payments, in year three	174.8
Expected future benefit payments, in year four	174.3
Expected future benefit payments, in year five	174.2
Expected future benefit payments, thereafter	$ 814.7