Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets:
Foreign tax credits	$ 121.8	$ 145.9
Employee compensation	33.8	40.6
Other comprehensive income	90.3	79.3
Research and development capitalization	115.6	132.4
Net operating loss and capital loss carryforwards	59.4	46.4
Pension and other postretirement benefits	29.4	36.5
Other	87.1us-gaap_DeferredTaxAssetsOther	75.8us-gaap_DeferredTaxAssetsOther
Total deferred tax assets	537.4us-gaap_DeferredTaxAssetsGross	556.9us-gaap_DeferredTaxAssetsGross
Valuation allowance	(46.4)	(34.2)
Net deferred tax asset	491.0us-gaap_DeferredTaxAssetsNet	522.7us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:
Goodwill and intangible assets	(133.1)	(139.5)
Fixed assets	(93.4)	(105.4)
Other	(40.0)us-gaap_DeferredTaxLiabilitiesOther	(36.7)us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities	(266.5)us-gaap_DeferredIncomeTaxLiabilities	(281.6)us-gaap_DeferredIncomeTaxLiabilities
Net deferred taxes	$ 224.5us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 241.1us-gaap_DeferredTaxAssetsLiabilitiesNet

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