Accumulated Other Comprehensive Income (Loss) (Components of accumulated comprehensive loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ (14.0)
Ending balance	(19.1)		(14.0)
Cumulative Translation Adjustment [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(5.1)	2.8
Foreign currency translation adjustments	(5.3)	(0.4)
Recognition of actuarial loss	0	0
Ending balance	(10.4)	2.4
Pension and Postretirement Benefits [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(8.9)	0.6
Foreign currency translation adjustments	0	0
Recognition of actuarial loss	0.2	(0.1)
Ending balance	(8.7)	0.5
Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(14.0)	3.4
Foreign currency translation adjustments	(5.3)	(0.4)
Recognition of actuarial loss	0.2	(0.1)
Ending balance	$ (19.1)	$ 2.9

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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- Definition

Amount before tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans.

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