Pension Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans
Estimated U.S. federal subsidies expected to be received under the Medicare Prescription Drug, Improvement and Modernization Act of 2003, no more than	$ 0.3
Domestic Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions	8.6	$ 2.6
Defined benefit plan, estimated future employer contributions in next fiscal year	2.5
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected future benefit payments in 2019	14.5
Expected future benefit payments in 2020	8.8
Expected future benefit payments in 2021	8.0
Expected future benefit payments in 2022	8.3
Expected future benefit payments in 2023	7.8
Expected future benefit payments in 2024-2025	36.7
Foreign Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions	19.1	17.5
Defined benefit plan, estimated future employer contributions in next fiscal year	17.0
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected future benefit payments in 2019	21.7
Expected future benefit payments in 2020	18.7
Expected future benefit payments in 2021	19.8
Expected future benefit payments in 2022	20.9
Expected future benefit payments in 2023	21.8
Expected future benefit payments in 2024-2025	117.2
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions	4.1	$ 4.3
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected future benefit payments in 2019	3.0
Expected future benefit payments in 2020	2.8
Expected future benefit payments in 2021	2.6
Expected future benefit payments in 2022	2.4
Expected future benefit payments in 2023	2.2
Expected future benefit payments in 2024-2025	$ 9.8