The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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-Name Accounting Standards Codification

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Common Stock (Details Textual 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Share-based Compensation, Aggregate Disclosure
Stock-based compensation	$ 2	$ 2	$ 6	$ 7
Restricted Stock [Member]
Share-based Compensation, Aggregate Disclosure
Unrecognized compensation costs	6		6
Unrecognized compensation costs, Weighted Average Period			2.1
Stock Option [Member]
Share-based Compensation, Aggregate Disclosure
Unrecognized compensation costs	6		6
Unrecognized compensation costs, Weighted Average Period			0.9
Cash received from stock option exercises			4	2
Unrecorded tax benefit from stock options exercised			3	2
Restricted Stock Units Long Term Performance Units SARs [Member]
Share-based Compensation, Aggregate Disclosure
Unrecognized compensation costs	10		10
Unrecognized compensation costs, Weighted Average Period			1.6
Stock-based compensation			$ 8	$ 8