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Net Income (Loss) Per Common Share (Tables)
 12 Months Ended
Dec. 31, 2011
Net Income Per Common Share [Abstract]  
Basic And Diluted Income From Continuing Operations Per Common Share
Basic and diluted income (loss) from continuing operations per common share and net income (loss) per common share are presented in the following table.
(in millions, except per share data)
 
 
 
 
 
Years Ended December 31
2011
 
2010
 
2009
Basic and diluted
 
 
 
 
 
Income from continuing operations
$
393

 
$
260

 
$
16

Less:
 
 
 
 
 
Preferred stock dividends
—

 
29

 
134

Redemption discount accretion on preferred stock
—

 
94

 
—

Income allocated to participating securities
4

 
1

 
1

Income (loss) from continuing operations attributable to common shares
$
389

 
$
136

 
$
(119
)
Net income
$
393

 
$
277

 
$
17

Less:
 
 
 
 
 
Preferred stock dividends
—

 
29

 
134

Redemption discount accretion on preferred stock
—

 
94

 
—

Income allocated to participating securities
4

 
1

 
1

Net income (loss) attributable to common shares
$
389

 
$
153

 
$
(118
)
Basic average common shares
185

 
170

 
149

Basic income (loss) from continuing operations per common share
$
2.11

 
$
0.79

 
$
(0.80
)
Basic net income (loss) per common share
2.11

 
0.90

 
(0.79
)
Basic average common shares
185

 
170

 
149

Dilutive common stock equivalents:
 
 
 
 
 
Net effect of the assumed exercise of stock options
—

 
1

 
—

Net effect of the assumed exercise of warrants
1

 
2

 
—

Diluted average common shares
186

 
173

 
149

Diluted income (loss) from continuing operations per common share
$
2.09

 
$
0.78

 
$
(0.80
)
Diluted net income (loss) per common share
2.09

 
0.88

 
(0.79
)
Average Shares Excluded From Diluted Net Income Per Share Computations Due To Exercise Price Higher Than Market Price
The following average shares related to outstanding options and warrants to purchase shares of common stock were not included in the computation of diluted net income (loss) per common share because the prices of the options and warrants were greater than the average market price of common shares for the period.
(shares in millions)
2011
 
2010
 
2009
Average outstanding options
17.1
 
15.1
 
17.6
Range of exercise prices
$25.34 - $64.50
 
$36.24 - $64.50
 
 $28.07 - $66.81
Average outstanding warrants
6.0
 
 
 
11.5
Exercise price
$29.40 - $30.36
 
 
 
$29.40