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, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Foreign currency changes		$ (82.0)	$ (38.6)	$ 275.0
Postretirement Benefits [Member]
Net Periodic Benefit Cost:
Service cost		0.1	0.1	0.7
Interest cost		1.3	1.7	3.7
Expected return on plan assets		0.0	0.0	0.0
Amortization of prior service credit		(0.3)	(1.2)	(4.0)
Amortization of net actuarial losses		0.1	0.3	1.8
Amortization of transition obligation		0.0	0.0	0.0
Settlements/curtailments		0.0	(0.1)	0.0
Other		1.6	0.0	0.0
Net periodic benefit cost	[1]	2.8	0.8	2.2
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Actuarial (gains) losses		(0.3)	(2.6)	(5.6)
Prior service cost (credit)			1.0	(9.0)
Amortization of prior service credit		0.3	26.7	4.0
Amortization of net actuarial losses		(0.1)	(11.3)	(1.8)
Amortization of transition obligation		0.0	0.0	0.0
Foreign currency changes		0.0	(0.1)	0.2
Total recognized in other comprehensive (loss) income	[2]	(0.1)	13.7	(12.2)
Total recognized in net periodic benefit cost and other comprehensive income (loss)		2.7	14.5	(10.0)
Domestic Plan [Member] | Defined Benefit Pension Plans [Member]
Net Periodic Benefit Cost:
Service cost		4.3	6.4	13.0
Interest cost		3.0	6.5	25.1
Expected return on plan assets		(3.2)	(8.2)	(32.6)
Amortization of prior service credit		(0.1)	(0.2)	(0.7)
Amortization of net actuarial losses		5.2	10.8	43.7
Amortization of transition obligation		0.0	0.0	0.0
Settlements/curtailments		0.0	0.1	27.9
Other		0.0	0.0	0.0
Net periodic benefit cost	[1]	9.2	15.4	76.4
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Actuarial (gains) losses		(2.9)	13.6	1.8
Prior service cost (credit)		0.0	0.0	0.0
Amortization of prior service credit		0.1	1.3	0.7
Amortization of net actuarial losses		(5.2)	(274.4)	(71.6)
Amortization of transition obligation		0.0	0.0	0.0
Foreign currency changes		0.0	0.0	0.0
Total recognized in other comprehensive (loss) income	[2]	(8.0)	(259.5)	(69.1)
Total recognized in net periodic benefit cost and other comprehensive income (loss)		1.2	(244.1)	7.3
Foreign Plan [Member] | Defined Benefit Pension Plans [Member]
Net Periodic Benefit Cost:
Service cost		4.6	5.0	5.3
Interest cost		18.0	21.8	23.6
Expected return on plan assets		(28.2)	(33.0)	(36.4)
Amortization of prior service credit		(0.1)	(0.1)	(0.1)
Amortization of net actuarial losses		7.6	6.5	8.4
Amortization of transition obligation		0.0	0.0	0.1
Settlements/curtailments		3.7	0.3	0.5
Other		(0.7)	0.0	0.0
Net periodic benefit cost	[1]	4.9	0.5	1.4
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income:
Actuarial (gains) losses		(7.4)	(24.6)	(34.2)
Prior service cost (credit)		0.0	0.0	0.0
Amortization of prior service credit		0.1	0.1	0.1
Amortization of net actuarial losses		(11.3)	(7.8)	(9.1)
Amortization of transition obligation		0.0	0.0	(0.1)
Foreign currency changes		18.9	(29.6)	(19.4)
Total recognized in other comprehensive (loss) income	[2]	0.3	(61.9)	(62.7)
Total recognized in net periodic benefit cost and other comprehensive income (loss)		$ 5.2	$ (61.4)	$ (61.3)

[1] Includes $4.4 and $53.7 of the U.S. pension plans in 2016 and 2015, respectively, and immaterial amounts of the postretirement benefit plans (related to the U.S.) in 2016 and 2015, which are included in discontinued operations.

[2] Amounts represent the pre-tax effect classified within other comprehensive (loss) income. The net of tax amounts are classified within our Consolidated Statements of Comprehensive Income (Loss).