v2.3.0.11
Stock-Based Compensation (Details 1) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Stock-Based Compensation, Before Tax: [Abstract]        
Stock options $ 4 $ 5 $ 9 $ 9
Retention awards 17 16 34 29
Total stock-based compensation, before tax 21 21 43 38
Excess tax benefits from equity compensation plans $ 29 $ 2 $ 67 $ 11