Employee Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Foreign Plan [Member]
Defined Pension and Postretirement Benefit Plans
Service cost	$ 1.0	$ 2.2	$ 1.9	$ 4.9
Interest cost	3.3	4.7	6.6	9.2
Expected return on plan assets	(4.4)	(5.3)	(8.7)	(10.6)
Settlements and curtailments	0.0	0.2	0.0	0.2
Amortization of:
Prior service cost	0.0	0.0	0.0	0.0
Unrecognized actuarial losses	1.4	0.9	2.7	1.8
Net periodic cost	1.3	2.7	2.5	5.5
Pension plan - employer contributions			8.6
Pension plan - estimated employer contributions for remainder of current fiscal year	9.0		9.0
Domestic Plan [Member]
Defined Pension and Postretirement Benefit Plans
Service cost	0.0	0.0	0.0	0.0
Interest cost	1.2	1.5	2.5	3.0
Expected return on plan assets	(1.5)	(1.7)	(3.1)	(3.4)
Settlements and curtailments	0.0	0.0	0.0	0.0
Amortization of:
Prior service cost	0.0	0.0	0.0	0.0
Unrecognized actuarial losses	0.4	(1.2)	0.8	0.7
Net periodic cost	0.1	(1.4)	0.2	0.3
Pension plan - employer contributions			0.3
Pension plan - estimated employer contributions for remainder of current fiscal year	2.0		2.0
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	0.6	0.7
Expected return on plan assets	0.0	0.0	0.0	0.0
Settlements and curtailments	0.0	0.0	0.0	0.0
Amortization of:
Prior service cost	0.0	0.1	0.0	0.0
Unrecognized actuarial losses	0.0	0.0	0.0	0.0
Net periodic cost	$ 0.3	$ 0.4	$ 0.6	$ 0.7