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Incentive Based Compensation
3 Months Ended
Mar. 31, 2016
Incentive Based Compensation Plans [Abstract]  
Incentive Based Compensation [Text Block]
Incentive Based Compensation
 Stock options, restricted stock awards and restricted stock units
The following table presents a summary of activity for the first three months of 2016
 
Stock Options
 
Restricted Stock Awards & Units
 
Number of
Shares
 
Weighted
Average
Exercise Price
 
Awards
 
Weighted
Average Grant
Date Fair Value
Outstanding at December 31, 2015
12,665,419

 

$29.97

 
4,017,344

 

$30.76

Granted
1,680,000

(a) 

$7.22

 
5,230,708

 

$7.91

Options Exercised/Stock Vested

 

 
(44,096
)
 

$32.01

Canceled
(181,681
)
 

$29.69

 
(220,614
)
 

$30.00

Outstanding at March 31, 2016
14,163,738

 

$27.27

 
8,983,342

 

$17.47

(a)    The weighted average grant date fair value of stock option awards granted was $1.97 per share.
Stock-based performance unit awards
 During the first three months of 2016, we granted 1,205,517 stock-based performance units to certain officers. The grant date fair value per unit was $3.72.