Consolidated Statements of Changes in Equity (Unaudited) (USD $) In Millions, except Share data	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Loss	Non-controlling Interest
Beginning Balance at Dec. 31, 2010	$ 6,767	$ 3,440	$ 3,431	$ (149)	$ 45
Beginning Balance, shares at Dec. 31, 2010	169,428,406	169,428,000
Net Income	378		378
Dividends declared on common stock	(293)		(293)
Repurchase of common stock	(42)	(42)
Repurchase of common stock, shares		(867,000)
Benefit obligations, net of tax	2			2
Foreign currency translation, net of tax	1			1
Stock-based compensation, distributions to noncontrolling interests and other	11	17			(6)
Stock-based compensation, distributions to noncontrolling interests and other, shares		768,000
Ending Balance at Jun. 30, 2011	$ 6,824	$ 3,415	$ 3,516	$ (146)	$ 39
Ending Balance, shares at Jun. 30, 2011	169,328,889	169,329,000