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Incentive Based Compensation Plans
 6 Months Ended
Jun. 30, 2014
Incentive Based Compensation Plans [Abstract]  
Incentive Based Compensation [Text Block]
Incentive Based Compensation
 Stock option and restricted stock awards
  The following table presents a summary of stock option and restricted stock award activity for the first six months of 2014: 
 
Stock Options
 
Restricted Stock
 
Number of
Shares
 
Weighted
Average
Exercise Price
 
Awards
 
Weighted
Average Grant
Date Fair Value
Outstanding at December 31, 2013
18,104,887

 

$27.27

 
4,031,888

 

$31.80

Granted
1,935,423

(a) 

$34.48

 
1,887,487

 

$34.84

Options Exercised/Stock Vested
(3,800,690
)
 

$20.15

 
(694,785
)
 

$33.10

Canceled
(440,429
)
 

$34.14

 
(319,737
)
 

$31.65

Outstanding at June 30, 2014
15,799,191

 

$29.68

 
4,904,853

 

$32.79


(a)    The weighted average grant date fair value of stock option awards granted was $10.50 per share.
Stock-based performance unit awards
 During the first six months of 2014, we granted 221,491 stock-based performance units to certain officers. The grant date fair value per unit was $34.28.