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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Estimated effective tax rate	38.20%
Reclassification of deferred tax assets to offset deferred tax liabilities	$ 14

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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