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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2012
Earnings Per Share [Abstract]  
Schedule Of Calculation Of Basic And Diluted Earnings Per Share
The calculation of basic and diluted earnings per share is as follows (in millions, except per share data):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2012
 
2011
 
2012
 
2011
Numerator for basic and diluted earnings per share:
 
 
 
 
 
 
 
Income from continuing operations
$
111.8

 
$
145.4

 
$
191.1

 
$
219.3

Income from discontinued operations
—

 
1.3

 
—

 
3.1

Net income
$
111.8

 
$
146.7

 
$
191.1

 
$
222.4

Dividends and equivalents for share-based awards expected to be forfeited
—

 
—

 
—

 
0.1

Net income for basic earnings per share
$
111.8

 
$
146.7

 
$
191.1

 
$
222.5

Effect of Preferred Securities (1)
—

 
3.5

 
—

 
—

Net income for diluted earnings per share
$
111.8

 
$
150.2

 
$
191.1

 
$
222.5

Denominator for basic and diluted earnings per share:
 
 
 
 
 
 
 
Weighted-average shares outstanding
289.4

 
291.4

 
289.4

 
291.3

Share-based payment awards classified as participating securities
2.7

 
2.9

 
2.7

 
2.9

Denominator for basic earnings per share
292.1

 
294.3

 
292.1

 
294.2

Dilutive securities (2)
1.9

 
2.3

 
2.2

 
2.7

Convertible Notes (3)
—

 
—

 
—

 
0.5

Preferred Securities (1)
—

 
8.3

 
—

 
—

Denominator for diluted earnings per share
294.0

 
304.9

 
294.3

 
297.4

Basic earnings per share:
 
 
 
 
 
 
 
Income from continuing operations
$
0.38

 
$
0.49

 
$
0.65

 
$
0.75

Income from discontinued operations
—

 
—

 
—

 
0.01

Net income
$
0.38

 
$
0.50

 
$
0.65

 
$
0.76

Diluted earnings per share:
 
 
 
 
 
 
 
Income from continuing operations
$
0.38

 
$
0.49

 
$
0.65

 
$
0.74

Income from discontinued operations
—

 
—

 
—

 
0.01

Net income
$
0.38

 
$
0.49

 
$
0.65

 
$
0.75