Earnings Per Share and Share Repurchases (Details) (USD $) In Millions, except Per Share data	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Earnings Per Share [Abstract]
Income from continuing operations	$ 16	$ 78	$ 61	$ 79
Income (loss) from discontinued operations, net of tax	0	5	1	16
Net income applicable to common shares	16	83	62	95
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted average outstanding shares of common stock	157.4	160.1	158.1	160.1
Dilutive effect of employee stock options and restricted stock	2.8	1.4	2.8	1.3
Common stock and common stock equivalents	160.2	161.5	160.9	161.4
Earnings Per Share, Basic [Abstract]
Basic earnings (loss) per share from continuing operations	$ 0.1	$ 0.49	$ 0.38	$ 0.49
Basic earnings (loss) per share from discontinued operations	$ 0.00	$ 0.03	$ 0.01	$ 0.1
Net earnings (loss) per share (Basic)	$ 0.1	$ 0.52	$ 0.39	$ 0.59
Earnings Per Share, Diluted [Abstract]
Diluted earnings (loss) per share from continuing oeprations	$ 0.1	$ 0.48	$ 0.38	$ 0.49
Diluted earnings (loss) per share from discontinued operations	$ 0.00	$ 0.03	$ 0.01	$ 0.1
Net earnings (loss) per share (Diluted)	$ 0.1	$ 0.51	$ 0.39	$ 0.59
Shares repurchased
Stock Repurchased and Retired During Period, Shares	0	1.5	3.6	1.5
Stock Repurchased and Retired During Period, Value	$ 0	$ 20	$ 70	$ 20

Gain (loss) after tax expense or benefit, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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

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-Name Emerging Issues Task Force (EITF)

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