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, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan | U.S.
Net Periodic Benefit Cost:
Service cost	$ 1.2	$ 1.7	$ 2.9
Interest cost	1.4	2.3	2.3
Expected return on plan assets	(2.6)	(3.4)	(3.5)
Amortization of prior service credit	0.0	0.0	0.0
Amortization of net actuarial losses	2.9	2.8	4.1
Amortization of transition obligation	0.0	0.0	0.0
Settlements/curtailments	2.6	3.0	1.4
Special termination benefits	0.0	0.0	0.0
Other	0.0	0.0	0.0
Net periodic benefit cost	5.5	6.4	7.2
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Actuarial losses (gains)	0.8	(3.0)	(2.8)
Prior service cost (credit)	0.0	0.0	0.0
Amortization of prior service credit	0.0	0.0	0.1
Amortization of net actuarial losses	(5.5)	(5.7)	(5.6)
Foreign currency changes	0.0	0.0	0.0
Total recognized in other comprehensive (loss) income	(4.7)	(8.7)	(8.3)
Total recognized in net periodic benefit cost and other comprehensive loss	0.8	(2.3)	(1.1)
Pension Plan | Non-U.S. Plans
Net Periodic Benefit Cost:
Service cost	4.3	4.0	4.7
Interest cost	11.7	15.3	15.4
Expected return on plan assets	(16.0)	(31.0)	(31.9)
Amortization of prior service credit	(0.1)	0.0	(0.1)
Amortization of net actuarial losses	6.3	4.9	6.8
Amortization of transition obligation	0.0	0.0	0.0
Settlements/curtailments	0.1	(0.6)	(0.4)
Special termination benefits	0.0	0.0	0.0
Other	0.0	0.0	0.0
Net periodic benefit cost	6.3	(7.4)	(5.5)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Actuarial losses (gains)	15.9	13.1	12.2
Prior service cost (credit)	0.0	0.0	2.2
Amortization of prior service credit	0.0	0.0	0.1
Amortization of net actuarial losses	(6.4)	(4.6)	(6.4)
Foreign currency changes	11.6	1.7	(9.1)
Total recognized in other comprehensive (loss) income	21.1	10.2	(1.0)
Total recognized in net periodic benefit cost and other comprehensive loss	27.4	2.8	(6.5)
Other Postretirement Benefits Plan
Net Periodic Benefit Cost:
Service cost	0.0	0.1	0.1
Interest cost	0.7	1.2	1.1
Expected return on plan assets	0.0	0.0	0.0
Amortization of prior service credit	(0.2)	(0.2)	(0.4)
Amortization of net actuarial losses	0.0	0.0	0.0
Amortization of transition obligation	0.0	0.0	0.0
Settlements/curtailments	0.0	0.0	(0.3)
Special termination benefits	(4.2)	0.0	0.0
Other	0.0	0.0	0.1
Net periodic benefit cost	(3.7)	1.1	0.6
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Actuarial losses (gains)	1.5	2.5	(1.2)
Prior service cost (credit)	(4.1)	(1.3)	0.0
Amortization of prior service credit	0.2	0.2	0.6
Amortization of net actuarial losses	(1.6)	0.0	0.0
Foreign currency changes	0.0	0.0	0.0
Total recognized in other comprehensive (loss) income	(4.0)	1.4	(0.6)
Total recognized in net periodic benefit cost and other comprehensive loss	$ (7.7)	$ 2.5	$ 0.1