Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 M	Jun. 30, 2011
Income Taxes (Textual) [Abstract]
Income tax expense	$ 30	$ 38	$ 34	$ 51
Income from continuing operations pre-tax loss	(19)	64	34	48
Effective tax rate			100.00%
State income tax benefit			21
Time limits for tax audit closings, settlements and expiration of applicable statutes of limitations in various jurisdictions			12
Anticipation of the reasonably possible change in uncertain tax positions	$ 6		$ 6

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Time limits for tax audit closings, settlements and expiration of applicable statutes of limitations in various jurisdictions.

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No definition available.

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- 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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- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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-Glossary Income Tax Expense (or Benefit)

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- Definition

The estimated lower 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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- Definition

The sum of state and local current and deferred income tax expense or benefit attributable to continuing operations.

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