Pension and Other Post-Retirement Benefit Plans (Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pensions | U.S.
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Service cost		$ 0.2	$ 10.3
Interest cost		23.8	26.7
Defined Benefit Plan, Expected Return (Loss) on Plan Assets		50.1	45.5
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		(0.4)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment			26.8
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		(25.7)	(35.3)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		(73.5)	26.7
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax		(0.2)	0.2
Settlements and curtailments		0.4	(26.8)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax		72.9	0.3
Pensions | International
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Service cost		21.2	21.0	$ 11.7
Interest cost		20.9	19.6	10.9
Defined Benefit Plan, Expected Return (Loss) on Plan Assets		41.2	36.3	8.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		(0.4)	(1.5)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment		3.8		10.7
Defined Benefit Plan, Amortization of Gain (Loss)		(0.6)	(2.5)	(1.0)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)		1.3	1.0	0.7
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		(0.6)	9.3	5.4
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		(15.3)	43.3	(10.5)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax		2.7	(0.1)	(0.1)
Settlements and curtailments		(3.4)	1.5	(10.7)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	[1]	(0.6)	(2.5)	(1.0)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	[1]	1.3	1.0	0.7
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax		(1.4)	5.1	(17.6)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax		18.1	(43.3)	$ 1.8
Other Post-retirement Benefits
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Interest cost		0.4	0.3
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		0.4	0.3
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax			(0.8)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax		0.1
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax		$ 0.1	$ 0.8

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 20 for additional details).