Equity-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2011

Equity-Based Compensation Disclosure [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Compensation expense recognized for equity-based plans is as follows (millions):

	Three Months Ended				Six Months Ended
	6/30/11		6/30/10		6/30/11		6/30/10
Restricted stock units
and performance stock units	$	33	$	25	$	102	$	82
Stock options		12		13		45		46
Total impact on operating income	$	45	$	38	$	147	$	128
Tax benefit recognized	$	15	$	15	$	53	$	49

Assumptions Used to Value Option Grants

The table below presents the weighted-average values of the assumptions used to value the stock options at their grant date.

	Six Months Ended June 30,
	2011	2010
Expected volatility	29.5%	29.5%
Expected term to exercise from grant date	6.31 years	6.51 years
Risk-free rate	2.8%	2.9%
Expected dividend yield	2.6%	3.2%