Pension and Other Postretirement Benefits - Benefit Plan Obligations, Plan Assets, Funded Status, and Net Liability Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Amounts recognized in statement of financial position consist of:
Noncurrent liabilities				$ (92.9)	$ (100.3)
Pension Benefits
Change in Benefit Obligation:
Benefit obligation at beginning of year	$ 463.9	$ 370.9
Service cost	6.7	5.5	$ 4.9
Interest cost	15.8	15.0	15.9
Currency	(4.6)	6.8
Actuarial (gain) loss	(29.3)	33.3
Benefit payments from plans	(20.3)	(18.1)
Settlement payments	(2.2)	(1.5)
Net transfer in	0.0	51.7
Other	0.7	0.3
Benefit obligation at end of year	430.7	463.9	370.9
Change in Plan Assets:
Fair value of plan assets at beginning of year	400.4	318.1
Actual gain (loss) on plan assets	(18.9)	38.5
Employer contributions	18.2	14.3
Currency	(2.7)	2.2
Benefit payments	(20.3)	(18.1)
Settlement payments	(2.2)	(1.5)
Net transfers in	0.0	46.8
Other	0.7	0.1
Fair value of plan assets at end of year	375.2	400.4	318.1
Reconciliation of Funded Status
Fair value of plan assets	400.4	318.1	318.1	375.2	400.4
Projected benefit obligation	463.9	370.9	370.9	430.7	463.9
Net liability recognized in statement of financial position				(55.5)	(63.5)
Amounts recognized in statement of financial position consist of:
Current liabilities				(1.7)	(3.7)
Noncurrent liabilities				(53.8)	(59.8)
Net liability recognized in statement of financial position				(55.5)	(63.5)
Postretirement Benefits Other than Pensions
Change in Benefit Obligation:
Benefit obligation at beginning of year	44.0	40.7
Service cost	1.1	1.2	1.3
Interest cost	1.4	1.4	1.6
Currency	(0.3)	0.6
Actuarial (gain) loss	1.1	3.9
Benefit payments from plans	(4.9)	(3.8)
Settlement payments	0.0	0.0
Net transfer in	0.0	0.0
Other	0.0	0.0
Benefit obligation at end of year	42.4	44.0	40.7
Change in Plan Assets:
Fair value of plan assets at beginning of year	0.0	0.0
Actual gain (loss) on plan assets	0.0	0.0
Employer contributions	0.0	0.0
Currency	0.0	0.0
Benefit payments	0.0	0.0
Settlement payments	0.0	0.0
Net transfers in	0.0	0.0
Other	0.0	0.0
Fair value of plan assets at end of year	0.0	0.0	0.0
Reconciliation of Funded Status
Fair value of plan assets	0.0	0.0	0.0	0.0	0.0
Projected benefit obligation	$ 44.0	40.7	$ 40.7	42.4	44.0
Net liability recognized in statement of financial position				(42.4)	(44.0)
Amounts recognized in statement of financial position consist of:
Current liabilities				(5.2)	(5.3)
Noncurrent liabilities				(37.2)	(38.7)
Net liability recognized in statement of financial position				$ (42.4)	(44.0)
W.A. Sanders Coldenhove Holding B.V. | Pension Benefits
Amounts recognized in statement of financial position consist of:
Net liability recognized in statement of financial position					$ (51.7)
Level 3 | Insurance Contracts Acquired in Business Combination | W.A. Sanders Coldenhove Holding B.V.
Amounts recognized in statement of financial position consist of:
Net Purchases/ (Settlements)		$ 46.8