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Earnings per Share (EPS) (Tables)
 3 Months Ended
Mar. 31, 2013
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:
 
 
Three Months Ended
March 31,
 
 
2013
 
2012
 
 
(Dollars in millions)
EPS numerator:
 
 
 
 
(Loss) income from continuing operations, net of income taxes
 
$
(10.3
)
 
$
183.0

Less: Net income attributable to noncontrolling interests
 
4.0

 
5.6

(Loss) income from continuing operations attributable to common stockholders, before allocation of earnings to participating securities
 
(14.3
)
 
177.4

Less: Earnings from continuing operations allocated to participating
   securities
 
—

 
1.2

(Loss) income from continuing operations attributable to common
   stockholders, after allocation of earnings to participating
   securities (1)   
 
(14.3
)
 
176.2

Loss from discontinued operations, net of income taxes
 
(9.1
)
 
(4.7
)
Net (loss) income attributable to common stockholders, after
   allocation of earnings to participating securities (1)
 
$
(23.4
)
 
$
171.5

 
 
 
 
 
EPS denominator:
 
 
 
 
Weighted average shares outstanding — basic
 
266.9

 
270.1

Impact of dilutive securities
 
—

 
0.8

Weighted average shares outstanding — diluted
 
266.9

 
270.9

 
 
 
 
 
Basic EPS attributable to common stockholders:
 
 
 
 
(Loss) income from continuing operations
 
$
(0.05
)
 
$
0.65

Loss from discontinued operations
 
(0.04
)
 
(0.02
)
Net (loss) income
 
$
(0.09
)
 
$
0.63

 
 
 
 
 
Diluted EPS attributable to common stockholders:
 
 
 
 
(Loss) income from continuing operations
 
$
(0.05
)
 
$
0.65

Loss from discontinued operations
 
(0.04
)
 
(0.02
)
Net (loss) income
 
$
(0.09
)
 
$
0.63

(1) 
The reallocation adjustment for participating securities to arrive at the numerator used to calculate diluted EPS was less than $0.1 million for the three months ended March 31, 2012.