Income Taxes (Unrecognized Tax Benefit) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Beginning balance	$ 363.3us-gaap_UnrecognizedTaxBenefits	$ 497.5us-gaap_UnrecognizedTaxBenefits	$ 503.4us-gaap_UnrecognizedTaxBenefits
Additions based on tax positions related to the current year	6.7	19.9	8.5
Additions based on tax positions related to prior years	49.8	152.9	88.2
Reductions based on tax positions related to prior years	(52.4)	(215.3)	(24.1)
Reductions related to settlements with tax authorities	(8.0)	(84.7)	(50.6)
Reductions related to lapses of statute of limitations	(7.1)	(8.4)	(29.5)
Translation (gain)/loss	(8.5)	1.4	1.6
Ending balance	$ 343.8us-gaap_UnrecognizedTaxBenefits	$ 363.3us-gaap_UnrecognizedTaxBenefits	$ 497.5us-gaap_UnrecognizedTaxBenefits

Amount of tax expense (benefit), 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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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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