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Retirement Plans and Other OCI and Asset Allocation (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
U.S. Pension Benefits
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income:
Net (gain) loss		$ (6.8)	$ 1.3
Amortization of actuarial gain (loss)		(4.1)	(4.2)
Amortization of prior service cost		(0.1)	(0.1)
Disposals		0.0	0.0
Settlements		0.0	0.0
Foreign exchange effect		0.0	0.0
Total recognized in other comprehensive income		(11.0)	(3.0)
Amounts expected to be recognized as components of net periodic cost at the end of the period
Actuarial net loss		4.0
Prior service cost		0.1
Total amount expected to be recognized as components of net periodic cost at the end of the period		4.1
Accumulated Benefit Obligations in Excess of Plan Assets
Projected benefit obligation		160.4	167.6
Accumulated benefit obligation		153.3	161.2
Fair value of plan assets		$ 118.5	$ 117.1
Investment Strategy [Abstract]
Expected return on plan assets		7.00%	7.00%	7.50%
Non-U.S. Pension Benefits
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income:
Net (gain) loss		$ (0.7)	$ 39.7
Amortization of actuarial gain (loss)		(3.5)	(5.6)
Amortization of prior service cost		0.0	(2.3)
Disposals		(79.4)	0.0
Settlements		(1.5)	0.0
Foreign exchange effect		7.1	(12.2)
Total recognized in other comprehensive income		(78.0)	19.6
Amounts expected to be recognized as components of net periodic cost at the end of the period
Actuarial net loss		3.3
Prior service cost		0.0
Total amount expected to be recognized as components of net periodic cost at the end of the period		3.3
Accumulated Benefit Obligations in Excess of Plan Assets
Projected benefit obligation		231.6	211.5
Accumulated benefit obligation		229.4	209.7
Fair value of plan assets		$ 121.2	$ 108.3
Investment Strategy [Abstract]
Expected return on plan assets		4.43%	5.90%	5.93%
U.S. Other Benefits
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income:
Net (gain) loss		$ (0.3)	$ (0.6)
Amortization of actuarial gain (loss)		1.2	0.0
Amortization of prior service cost		0.0	0.0
Disposals		0.0	0.0
Settlements		0.0	0.0
Foreign exchange effect		0.0	0.0
Total recognized in other comprehensive income		0.9	$ (0.6)
Amounts expected to be recognized as components of net periodic cost at the end of the period
Actuarial net loss		0.1
Prior service cost		0.0
Total amount expected to be recognized as components of net periodic cost at the end of the period		$ 0.1
Equity Securities \| U.S. Pension Benefits
Investment Strategy [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations		31.00%	32.00%
Fixed Income Securities \| U.S. Pension Benefits
Investment Strategy [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations		69.00%	68.00%
Fixed Income Securities \| Non-U.S. Pension Benefits
Investment Strategy [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations		72.00%
Equity Funds \| Non-U.S. Pension Benefits
Investment Strategy [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations		28.00%
North America \| Non-U.S. Pension Benefits
Investment Strategy [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations		6.00%
Europe \| Non-U.S. Pension Benefits
Investment Strategy [Abstract]
Defined Benefit Plan, Actual Plan Asset Allocations		94.00%
Subsequent Event \| Minimum \| Equity Securities \| U.S. Pension Benefits
Investment Strategy [Abstract]
Target plan asset allocations	22.00%
Subsequent Event \| Minimum \| Equity Securities \| Non-U.S. Pension Benefits
Investment Strategy [Abstract]
Target plan asset allocations	32.00%
Subsequent Event \| Minimum \| Fixed Income Securities \| U.S. Pension Benefits
Investment Strategy [Abstract]
Target plan asset allocations	64.00%
Subsequent Event \| Minimum \| Fixed Income Securities \| Non-U.S. Pension Benefits
Investment Strategy [Abstract]
Target plan asset allocations	67.00%
Subsequent Event \| Maximum \| Equity Securities \| U.S. Pension Benefits
Investment Strategy [Abstract]
Target plan asset allocations	36.00%
Subsequent Event \| Maximum \| Equity Securities \| Non-U.S. Pension Benefits
Investment Strategy [Abstract]
Target plan asset allocations	33.00%
Subsequent Event \| Maximum \| Fixed Income Securities \| U.S. Pension Benefits
Investment Strategy [Abstract]
Target plan asset allocations	78.00%
Subsequent Event \| Maximum \| Fixed Income Securities \| Non-U.S. Pension Benefits
Investment Strategy [Abstract]
Target plan asset allocations	68.00%