Employee Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Domestic Plan [Member]
Defined Pension and Postretirement Benefit Plans
Service cost	$ 0.0	$ 0.0
Interest cost	1.1	1.3
Expected return on plan assets	(1.8)	(1.6)
Amortization of:
Unrecognized actuarial losses	0.4	0.4
Net periodic cost	(0.3)	0.1
Pension plan - employer contributions	0.3
Pension plan - estimated employer contributions for remainder of current fiscal year	10.0
Foreign Plan [Member]
Defined Pension and Postretirement Benefit Plans
Service cost	1.1	0.9
Interest cost	3.4	3.3
Expected return on plan assets	(4.9)	(4.3)
Settlement and curtailments	0.2
Amortization of:
Unrecognized actuarial losses	1.5	1.3
Net periodic cost	1.3	1.2
Pension plan - employer contributions	5.7
Pension plan - estimated employer contributions for remainder of current fiscal year	14.0
Domestic Postretirement Benefit Plan
Defined Pension and Postretirement Benefit Plans
Service cost	0.0	0.0
Interest cost	0.3	0.3
Expected return on plan assets	0.0	0.0
Amortization of:
Unrecognized actuarial losses	0.0	0.0
Net periodic cost	$ 0.3	$ 0.3