Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parentheticals) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012		Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Defined Benefit Plan, Curtailments			$ 1.7
Pension curtailment gain	0	0	0.2	[1]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments			1.5
Currency translation adjustment, tax	2.1	3.3	1.0
Amortization of pension related costs, tax benefit	0.1	1.2	1.0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	(42.0)	33.5	(7.2)
Revaluation of derivative financial instruments, tax	2.3	(1.0)	0
Actuarial (Loss) Gain on Post-retirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification Of Tax Effect On Amortization Of Actuarial Losses To Deferred Taxes					2.0
Pension curtailment gain			0.1	[1]
Prior Service Cost On Post Retirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pension curtailment gain			$ 0.1	[1]

[1] As a result of the September 2012 Program, the Company recognized a curtailment gain of $1.7 million, partially offset by $0.1 million of accumulated actuarial losses and $0.1 million of prior service costs previously reported within Accumulated Other Comprehensive Loss, for a net gain of $1.5 million, which was recorded within restructuring charges for 2012. See Note 14, “Savings Plan, Pension and Post-retirement Benefits,” for further discussion of the Company’s pension and other post-retirement plans.