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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

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-Topic 740

-SubTopic 10

-Section S99

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-Subparagraph (SAB TOPIC 6.I)

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	Apr. 30, 2014	Jun. 30, 2014	Jun. 30, 2013
Income Taxes [Line Items]
Unrecognized tax benefits that would have a favorable impact		$ 286.0
Reductions to unrecognized tax benefits, upper bound		$ 230
Domestic Tax Authority [Member]
Income Taxes [Line Items]
Income tax rate	21.00%	21.50%	23.00%
U.K. Tax Expected April 2015 [Member]
Income Taxes [Line Items]
Income tax rate		20.00%