Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2011	Jun. 30, 2011	Jun. 30, 2010
Income Taxes (Textuals) [Abstract]
Effective tax rate as a percentage of income from continuing operations before income taxes	28.20%	27.10%	9.70%
Combined federal and state statutory tax rate		37.20%
Net deferred tax asset from continuing operations	$ 348	$ 208	$ 594

For entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. A temporary difference is a difference between the tax basis of an asset or liability and its carrying amount in the financial statements prepared in accordance with generally accepted accounting principles that will reverse in ensuing periods.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 42, 43

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant