Employee Benefit Plans (Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Plan | U.S.
Net Periodic Benefit Cost:
Service cost	$ 2.9	$ 4.3	$ 6.4
Interest cost	2.3	3.0	6.5
Expected return on plan assets	(3.5)	(3.2)	(8.2)
Amortization of prior service credit	0.0	(0.1)	(0.2)
Amortization of net actuarial losses	4.1	5.2	10.8
Settlements/curtailments	1.4	0.0	0.1
Other	0.0	0.0	0.0
Net periodic benefit cost	7.2	9.2	15.4
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Actuarial (gains) losses	(2.8)	(2.9)	13.6
Prior service cost (credit)	0.0	0.0	0.0
Amortization of prior service credit	0.1	0.1	1.3
Amortization of net actuarial losses	(5.6)	(5.2)	(274.4)
Foreign currency changes	0.0	0.0	0.0
Total recognized in other comprehensive (loss) income	(8.3)	(8.0)	(259.5)
Total recognized in net periodic benefit cost and other comprehensive income (loss)	(1.1)	1.2	(244.1)
Pension Plan | Non-U.S. Plans
Net Periodic Benefit Cost:
Service cost	4.7	4.6	5.0
Interest cost	15.4	18.0	21.8
Expected return on plan assets	(31.9)	(28.2)	(33.0)
Amortization of prior service credit	(0.1)	(0.1)	(0.1)
Amortization of net actuarial losses	6.8	7.6	6.5
Settlements/curtailments	(0.4)	3.7	0.3
Other		(0.7)	0.0
Net periodic benefit cost	(5.5)	4.9	0.5
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Actuarial (gains) losses	12.2	(7.4)	(24.6)
Prior service cost (credit)	2.2	0.0	0.0
Amortization of prior service credit	0.1	0.1	0.1
Amortization of net actuarial losses	(6.4)	(11.3)	(7.8)
Foreign currency changes	(9.1)	18.9	(29.6)
Total recognized in other comprehensive (loss) income	(1.0)	0.3	(61.9)
Total recognized in net periodic benefit cost and other comprehensive income (loss)	(6.5)	5.2	(61.4)
Other Postretirement Benefits Plan
Net Periodic Benefit Cost:
Service cost	0.1	0.1	0.1
Interest cost	1.1	1.3	1.7
Expected return on plan assets	0.0	0.0	0.0
Amortization of prior service credit	(0.4)	(0.3)	(1.2)
Amortization of net actuarial losses	0.0	0.1	0.3
Settlements/curtailments	(0.3)	0.0	(0.1)
Other	0.1	1.6	0.0
Net periodic benefit cost	0.7	2.8	0.8
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Actuarial (gains) losses	(1.2)	(0.3)	(2.6)
Prior service cost (credit)	0.0		1.0
Amortization of prior service credit	0.6	0.3	26.7
Amortization of net actuarial losses	0.0	(0.1)	(11.3)
Foreign currency changes	0.0	0.0	(0.1)
Total recognized in other comprehensive (loss) income	(0.6)	(0.1)	13.7
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$ 0.1	$ 2.7	14.5
Discontinued Operations, Disposed of by Sale | Pension Plan | U.S.
Net Periodic Benefit Cost:
Net periodic benefit cost			$ 4.4