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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Stock compensation consisted of the following:
 
 
Three Months Ended
 
Six Months Ended
 
 
June 30,
 
June 30,
(In millions)
 
2012
 
2011
 
2012
 
2011
Stock compensation expense
 
$
1.7

 
$
1.8

 
$
3.6

 
$
3.6

Schedule of Share-based Compensation, Stock Options, Activity
The following table summarizes our stock option activity:
 
 
Stock Options
 
Weighted Average Exercise Price
Outstanding December 31, 2011
 
5,679,579

 
$
19.87

Granted
 
1,133,091

 
5.82

Exercised
 

 

Canceled
 
(311,081
)
 
27.69

Forfeited
 
(133,639
)
 
10.50

Outstanding June 30, 2012
 
6,367,950

 
$
17.13

Exercisable as of June 30, 2012
 
3,942,735

 
$
22.84

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table summarizes our weighted average assumptions used in the valuation of options:
 
2012
Volatility
45.1
%
Risk-free interest rate
1.1
%
Expected life (months)
71

Dividend yield
%
Schedule of Share-based Compensation, Restricted Stock Activity
The following table summarizes our restricted stock activity:
 
 
Restricted Stock
 
Weighted Average Grant Date Fair Value Per Share
Nonvested as of December 31, 2011
 
795,046

 
$
10.02

Granted
 
644,217

 
5.78

Vested
 
(298,840
)
 
10.48

Forfeited
 
(57,089
)
 
10.43

Nonvested as of June 30, 2012
 
1,083,334

 
$
7.35