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Stock-Based Compensation
9 Months Ended
Sep. 30, 2011
Share-based Compensation [Abstract] 
Stock-Based Compensation
Stock-Based Compensation
The Company accounts for stock-based compensation pursuant to certain authoritative guidance which requires measurement of compensation cost for all stock awards at fair value on the date of grant and recognition of compensation, net of estimated forfeitures, over the requisite service period for awards expected to vest. The Company recognized $11.7 million and $9.0 million of pretax stock-based compensation during the three months ended September 30, 2011 and 2010, respectively, and $28.4 million and $27.8 million during the nine months ended September 30, 2011 and 2010, respectively.
In determining the fair value of stock options granted during the nine months ended September 30, 2011, the Company utilized its historical experience to estimate the expected life of the options and volatility.
The following table summarizes the changes in the number of shares of common stock under option for the nine months ended September 30, 2011 (shares in millions):
 
Shares
 
Weighted Average Exercise Price
 
Exercisable
at Period
End
 
Aggregate    
Intrinsic    
Value    
Exercisable    
Outstanding at December 31, 2010
16.3

 
$
22

 
8.9

 
$
1.5

Granted
1.0

 
19

 
 
 
 
Forfeited / expired
(1.3
)
 
23

 
 
 
 
Outstanding at September 30, 2011
16.0

 
$
21

 
10.2

 
$
2.2


The following table summarizes the changes in the number of shares of restricted stock and restricted stock units for the nine months ended September 30, 2011 (shares in millions):
 
Shares
 
Weighted-    
Average Grant     
Date Fair Value    
Outstanding at December 31, 2010
5.2

 
$
13

Granted
2.4

 
17

Vested
(0.8
)
 
21

Forfeited
(0.2
)
 
13

Outstanding at September 30, 2011
6.6

 
$
13

During the nine months ended September 30, 2011, the Company awarded 0.5 million performance stock units which entitle recipients to shares of the Company’s stock at the end of a three-year vesting period if specified market conditions are achieved (“PSUs”). The PSUs entitle recipients to shares of common stock equal to 0% up to 200% of the number of units granted at the vesting date depending on the level of achievement of the specified market and service conditions. As of September 30, 2011, 2.2 million PSUs were outstanding, and based on performance through September 30, 2011, recipients of PSUs would be entitled to 0.9 million shares at the vesting date. The PSUs are included in the preceding table as if the participants earn shares equal to 100% of the units granted.

During the nine months ended September 30, 2011, the Company awarded 0.7 million performance stock units which entitle the recipient to shares of the Company's stock if specified market and service conditions are achieved. The performance stock units vest no earlier than two years from the date of grant and no later than seven years from the date of grant. Based on performance through September 30, 2011, the market conditions have not been achieved. The 0.7 million performance stock units are included in the preceding table as granted during the nine months ended September 30, 2011 and as outstanding as of September 30, 2011.