Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation (Details)

v2.4.0.6
Share-Based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Y
Jun. 30, 2011
Stock Options & Stock Appreciation Rights    
Award Outstanding, Beginning Balance 11,169,000  
Granted, Awards 2,100,000  
Exercised, Awards (1,752,000)  
Forfeited, Awards (21,000)  
Award Outstanding, Ending Balance 11,496,000  
Awards Exercisable, Ending Balance 5,763,000  
Weighted Average Exercise Price Outstanding, Beginning Balance $ 22.54  
Granted, Weighted Average Exercise Price $ 45.07  
Exercised, Weighted Average Exercise Price $ 10.29  
Forfeited, Weighted Average Exercise Price $ 38.74  
Weighted Average Exercise Price Outstanding, Ending Balance $ 28.50  
Exercisable, Weighted Average Exercise Price, Ending Balance $ 18.00  
Weighted Average Remaining Contractual Term Outstanding, Beginning Balance 5.5  
Weighted Average Remaining Contractual Term Outstanding, Ending Balance 6.3  
Exercisable, Weighted Average Remaining Contractual Term, Ending Balance 4.4  
Aggregate Intrinsic Value Outstanding, Beginning balance $ 332.8  
Aggregate Intrinsic Value Outstanding, Ending balance 242.6  
Exercisable, Aggregate Intrinsic Value, Ending Balance $ 176.0  
Incentive Plan and Independent Directors Stock Units    
Outstanding and nonvested at December 31, 2011, Shares 717,600  
Granted, shares     
Vested, Shares (311,500)  
Forfeited, Shares (300)  
Outstanding and nonvested at June 30, 2012, Shares 405,800  
Outstanding and nonvested at December 31, 2011, Weighted Average Grant Date Fair Value $ 12.25  
Weighted-average grant date fair value of SARs granted $ 15.36 $ 21.22
Vested, Weighted Average Grant Date Fair Value $ 10.06  
Forfeited, Weighted Average Grant Date Fair Value $ 6.82  
Outstanding and nonvested at June 30, 2012, Weighted Average Grant Date Fair Value $ 13.94