Employee Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Domestic Plan [Member]
Defined Pension and Postretirement Benefit Plans
Service cost	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Interest cost	1.2	1.3	3.4	3.8
Expected return on plan assets	(1.7)	(1.5)	(5.0)	(4.6)
Amortization of:
Prior service cost (credit)	0.0	0.0	0.0	0.0
Unrecognized actuarial losses	0.4	0.3	1.2	1.1
Net periodic cost	(0.1)	0.1	(0.4)	0.3
Pension plan - employer contributions			8.2
Pension plan - estimated employer contributions for remainder of current fiscal year	0.4		0.4
Foreign Plan [Member]
Defined Pension and Postretirement Benefit Plans
Service cost	1.1	1.0	3.1	2.9
Interest cost	3.1	3.4	9.9	10.0
Expected return on plan assets	(4.5)	(4.5)	(14.2)	(13.2)
Settlement and curtailments	0.1	4.0	0.3	4.0
Amortization of:
Prior service cost (credit)	0.0	0.1	0.1	0.1
Unrecognized actuarial losses	1.4	1.4	4.4	4.1
Net periodic cost	1.2	5.4	3.6	7.9
Pension plan - employer contributions			14.3
Pension plan - estimated employer contributions for remainder of current fiscal year	5.0		5.0
Domestic Postretirement Benefit Plan
Defined Pension and Postretirement Benefit Plans
Service cost	0.0	0.0	0.0	0.0
Interest cost	0.3	0.3	0.8	0.9
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of:
Prior service cost (credit)	0.0	(0.1)	(0.1)	(0.1)
Unrecognized actuarial losses	0.0	0.0	0.1	0.0
Net periodic cost	$ 0.3	$ 0.2	$ 0.8	$ 0.8