Pension And Other Retiree Benefits (Net Periodic Benefit Expense) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to defined benefit plans for 2018		$ 20.3
Contributions by company to date		11.3
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.4	$ 0.3
Interest cost		1.7	1.8
Expected return on plan assets		(2.9)	(3.1)
Amortization of net loss (gain)		0.6	0.5
Amortization of prior service cost		0.1	0.1
Net periodic benefit (income) expense(1)	[1]	(0.1)	(0.4)
Pension | International
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.5	0.3
Interest cost		3.4	2.9
Expected return on plan assets		(5.9)	(4.9)
Amortization of net loss (gain)		0.9	0.7
Amortization of prior service cost		0.0	0.0
Net periodic benefit (income) expense(1)	[1]	(1.1)	(1.0)
Post-retirement
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.0	0.0
Interest cost		0.0	0.0
Expected return on plan assets		0.0	0.0
Amortization of net loss (gain)		(0.1)	(0.1)
Amortization of prior service cost		0.0	0.0
Net periodic benefit (income) expense(1)	[1]	$ (0.1)	$ (0.1)

[1] The components, other than service cost, are included in the line "Non-operating pension income" in the Consolidated Statements of Income.