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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 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 shown below for the three months ended March 31, (in millions, except per share data):
 
2012
 
2011
Numerator for basic and diluted earnings per share:
 
 
 
Income from continuing operations
$
79.3

 
$
73.9

Income from discontinued operations
—

 
1.8

Net income
$
79.3

 
$
75.7

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

 
—

Net income for basic earnings per share
$
79.3

 
$
75.7

Effect of Preferred Securities (1)
—

 
—

Net income for diluted earnings per share
$
79.3

 
$
75.7

Denominator for basic and diluted earnings per share:
 
 
 
Weighted-average shares outstanding
289.3

 
291.2

Share-based payment awards classified as participating securities
2.8

 
3.0

Denominator for basic earnings per share
292.1

 
294.2

Dilutive securities (2)
2.6

 
3.1

Convertible Notes (3)
—

 
0.9

Preferred Securities (1)
—

 
—

Denominator for diluted earnings per share
294.7

 
298.2

Basic earnings per share:
 
 
 
Income from continuing operations
$
0.27

 
$
0.25

Income from discontinued operations
—

 
0.01

Net income
$
0.27

 
$
0.26

Diluted earnings per share:
 
 
 
Income from continuing operations
$
0.27

 
$
0.25

Income from discontinued operations
—

 
0.01

Net income
$
0.27

 
$
0.25