Pension Plans and Other Retirement Plans (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Funded Status of Pension Plans
Net funded status	$ (442.1)	$ (517.4)
Benefit Payments
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	80.6
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	80.3
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	80.5
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	81.0
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	80.8
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	399.9
Pension Plans
Funded Status of Pension Plans
Projected benefit obligation	1,332.7	1,648.7	$ 1,543.3
Defined Benefit Plan, Plan Assets, Amount	890.6	1,131.3	1,104.6
Net funded status	(442.1)	(517.4)
Defined Benefit Plan, Accumulated Benefit Obligation	1,263.0	1,570.0
Pension Plans with Underfunded or Unfunded Accumulated Benefit Obligation
Projected benefit obligation	1,279.3	1,624.0
Accumulated benefit obligation	1,213.3	1,549.6
Fair value of plan assets	$ 833.7	$ 1,109.8
Pension Plans | Domestic Plan [Member]
Pension plans and other postretirement benefit plans
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
Funded Status of Pension Plans
Projected benefit obligation	$ 1,027.1	$ 1,325.6	1,274.2
Defined Benefit Plan, Plan Assets, Amount	871.1	1,109.8	1,086.4
Net funded status	(156.0)	(215.8)
Pension Plans with Underfunded or Unfunded Accumulated Benefit Obligation
Projected benefit obligation	994.8	1,325.6
Accumulated benefit obligation	960.1	1,286.0
Fair value of plan assets	833.0	$ 1,109.8
Benefit Payments
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	72.1
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	71.9
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	71.9
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	72.2
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	71.7
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 349.9
Discount rate	4.22%	3.57%
Percentage of high yield bonds in foreign issuers portfolio	30.00%
Expected return on plan assets	5.25%	5.50%
Average annual returns over one year (as a percent)	(3.00%)
Average annual returns over three years (as a percent)	6.00%
Average annual returns over five years (as a percent)	5.00%
Average annual returns over ten years (as a percent)	8.00%
Pension Plans | Foreign Plan [Member]
Funded Status of Pension Plans
Projected benefit obligation	$ 305.6	$ 323.1	269.1
Defined Benefit Plan, Plan Assets, Amount	19.5	21.5	$ 18.2
Net funded status	(286.1)	(301.6)
Pension Plans with Underfunded or Unfunded Accumulated Benefit Obligation
Projected benefit obligation	284.5	298.4
Accumulated benefit obligation	253.2	$ 263.6
Fair value of plan assets	0.7
Benefit Payments
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	8.5
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	8.4
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	8.6
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	8.8
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	9.1
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 50.0
Discount rate	2.17%	1.84%
Expected return on plan assets	4.69%	4.69%
Pension Plans | Germany | Foreign Plan [Member]
Benefit Payments
Discount rate	2.05%
Percentage of German pension plans to total non-U.S. pension plans	92.00%	91.00%
Pension Plans | Overfunded Plan [Member] | Domestic Plan [Member]
Funded Status of Pension Plans
Projected benefit obligation	$ 32.4
Defined Benefit Plan, Plan Assets, Amount	38.1
Net funded status	5.7
Pension Plans | Unfunded Plan [Member] | Domestic Plan [Member]
Funded Status of Pension Plans
Projected benefit obligation	97.1	$ 108.5
Net funded status	(97.1)	(108.5)
Pension Plans | Unfunded Plan [Member] | Foreign Plan [Member]
Funded Status of Pension Plans
Projected benefit obligation	282.9	298.4
Net funded status	(282.9)	(298.4)
Pension Plans | Underfunded Plan [Member] | Domestic Plan [Member]
Funded Status of Pension Plans
Projected benefit obligation	897.6	1,217.1
Defined Benefit Plan, Plan Assets, Amount	833.0	1,109.8
Net funded status	(64.6)	(107.3)
Pension Plans | Underfunded Plan [Member] | Foreign Plan [Member]
Funded Status of Pension Plans
Projected benefit obligation	22.7	24.7
Defined Benefit Plan, Plan Assets, Amount	19.5	21.5
Net funded status	$ (3.2)	$ (3.2)