XML 47 R43.htm IDEA: XBRL DOCUMENT

Stock-Based Compensation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Summary of Stock Based Compensation Cost
Stock-based compensation cost	$ 108	$ 87	$ 88
Tax benefit	(22)	(18)	(15)
Stock-based compensation cost, net of tax	$ 86	$ 69	$ 73

Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset.

+ References+ Details