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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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The estimated upper bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	9 Months Ended
	Apr. 30, 2014	Mar. 31, 2014	Sep. 30, 2014
Income Taxes [Line Items]
Unrecognized tax benefits			$ 478.2
Unrecognized tax benefits that would have a favorable impact			304.9
Reductions to unrecognized tax benefits, upper bound			$ 230
Domestic Tax Authority [Member]
Income Taxes [Line Items]
Income tax rate	21.00%	23.00%	21.50%
U.K. Tax Expected April 2015 [Member]
Income Taxes [Line Items]
Income tax rate			20.00%