Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 205.8us-gaap_NetIncomeLoss	$ 171.8us-gaap_NetIncomeLoss	$ 90.0us-gaap_NetIncomeLoss
Other comprehensive income (loss):
Foreign currency translation adjustments	(45.7)	(30.7)	14.8
Reclassification of foreign currency translation adjustments into earnings	0	(41.1)	(3.7)
Net change in pension and post-retirement benefit liabilities	75.9	(56.7)	24.1
Change in fair value of available-for-sale marketable equity securities	0.7	(6.8)	1.9
Net change in fair value of cash flow hedges	(12.1)	(6.8)	5.2
Reclassification of pension and post-retirement benefit losses into earnings	6.9	9.5	14.9
Reclassification of cash flow hedge losses into earnings	5.7	4.2	7.9
Other comprehensive income (loss) before taxes	(120.4)	(15.0)	16.9
Tax (expense) benefit	28.0us-gaap_OtherComprehensiveIncomeLossTax	(23.8)us-gaap_OtherComprehensiveIncomeLossTax	(2.1)us-gaap_OtherComprehensiveIncomeLossTax
Other comprehensive income (loss), net of tax	(92.4)	(38.8)	14.8
Comprehensive income	$ 113.4us-gaap_ComprehensiveIncomeNetOfTax	$ 133.0us-gaap_ComprehensiveIncomeNetOfTax	$ 104.8us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount before tax and 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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