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, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Amounts recognized in statement of financial position consist of:
Noncurrent liabilities				$ (100.3)	$ (86.7)
Pension Benefits
Change in Benefit Obligation:
Benefit obligation at beginning of year	$ 370.9	$ 360.1
Service cost	5.5	4.9	$ 5.5
Interest cost	15.0	15.9	13.8
Currency	6.8	(3.1)
Actuarial (gain) loss	33.3	18.2
Benefit payments from plans	(18.1)	(17.1)
Settlement payments	(1.5)	(8.1)
Net transfer in	51.7	0.1
Other	0.3	0.0
Benefit obligation at end of year	463.9	370.9	360.1
Change in Plan Assets:
Fair value of plan assets at beginning of year	318.1	308.3
Actual gain (loss) on plan assets	38.5	17.6
Employer contributions	14.3	17.8
Currency	2.2	(1.7)
Benefit payments	(18.1)	(15.8)
Settlement payments	(1.5)	(8.1)
Net transfers in	46.8	0.0
Other	0.1	0.0
Fair value of plan assets at end of year	400.4	318.1	308.3
Reconciliation of Funded Status
Fair value of plan assets	318.1	308.3	308.3	400.4	318.1
Projected benefit obligation	370.9	360.1	360.1	463.9	370.9
Net liability recognized in statement of financial position				(63.5)	(52.8)
Amounts recognized in statement of financial position consist of:
Current liabilities				(3.7)	(3.8)
Noncurrent liabilities				(59.8)	(49.0)
Net liability recognized in statement of financial position				(63.5)	(52.8)
Postretirement Benefits Other than Pensions
Change in Benefit Obligation:
Benefit obligation at beginning of year	40.7	40.5
Service cost	1.2	1.3	1.7
Interest cost	1.4	1.6	1.6
Currency	0.6	0.1
Actuarial (gain) loss	3.9	(1.2)
Benefit payments from plans	(3.8)	(3.8)
Settlement payments	0.0	0.0
Net transfer in	0.0	0.0
Other	0.0	2.2
Benefit obligation at end of year	44.0	40.7	40.5
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	40.7	$ 40.5	$ 40.5	44.0	40.7
Net liability recognized in statement of financial position				(44.0)	(40.7)
Amounts recognized in statement of financial position consist of:
Current liabilities				(5.3)	(4.3)
Noncurrent liabilities				(38.7)	(36.4)
Net liability recognized in statement of financial position				(44.0)	$ (40.7)
W.A. Sanders Coldenhove Holding B.V. | Pension Benefits
Change in Plan Assets:
Fair value of plan assets at end of year	46.8
Reconciliation of Funded Status
Fair value of plan assets	$ 46.8			46.8
Amounts recognized in statement of financial position consist of:
Net liability recognized in statement of financial position				$ (51.7)