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Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Earnings allocation method utilized in the calculation of basic and diluted EPS
The following illustrates the earnings allocation method utilized in the calculation of basic and diluted EPS.
 
Year Ended December 31,
 
2012
 
2011
 
2010
 
(In millions, except per share amounts)
EPS numerator:
 

 
 

 
 

(Loss) income from continuing operations, net of income taxes
$
(470.9
)
 
$
1,012.8

 
$
825.0

Less: Net income (loss) attributable to noncontrolling interests
10.6

 
(11.4
)
 
28.2

(Loss) income from continuing operations attributable to common stockholders before allocation of earnings to participating securities
(481.5
)
 
1,024.2

 
796.8

Less: Earnings allocated to participating securities
—

 
5.3

 
5.6

(Loss) income from continuing operations attributable to common
 stockholders, after earnings allocated to participating securities(1)
(481.5
)
 
1,018.9

 
791.2

Loss from discontinued operations, net of income taxes
(104.2
)
 
(66.5
)
 
(22.8
)
Less: Loss from discontinued operations allocated to participating securities
—

 
(0.4
)
 
(0.2
)
Loss from discontinued operations attributable to common stockholders, after allocation of earnings to participating securities(1)
$
(104.2
)
 
$
(66.1
)
 
$
(22.6
)
Net (loss) income attributable to common stockholders, after earnings
allocated to participating securities(1)
$
(585.7
)
 
$
952.8

 
$
768.6

EPS denominator:
 

 
 

 
 

Weighted average shares outstanding — basic
268.0

 
269.1

 
267.0

Impact of dilutive securities
—

 
1.2

 
2.9

Weighted average shares outstanding — diluted
268.0

 
270.3

 
269.9

Basic EPS attributable to common stockholders:
 

 
 

 
 

(Loss) income from continuing operations
$
(1.80
)
 
$
3.78

 
$
2.96

Loss from discontinued operations
(0.39
)
 
(0.25
)
 
(0.08
)
Net (loss) income attributable to common stockholders
$
(2.19
)
 
$
3.53

 
$
2.88

Diluted EPS attributable to common stockholders:
 

 
 

 
 

(Loss) income from continuing operations
$
(1.80
)
 
$
3.77

 
$
2.92

Loss from discontinued operations
(0.39
)
 
(0.25
)
 
(0.08
)
Net (loss) income attributable to common stockholders
$
(2.19
)
 
$
3.52

 
$
2.84

(1) 
The reallocation adjustment for participating securities to arrive at the numerator used to calculate diluted EPS was less than $0.1 million for 2011 and 2010.