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Earnings per Share (EPS) (Tables)
 9 Months Ended
Sep. 30, 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
September 30,
 
Nine Months Ended
September 30,
 
 
2013
 
2012
 
2013
 
2012
 
 
(Dollars in millions)
EPS numerator:
 
 
 
 
 
 
 
 
Income from continuing operations, net of income taxes
 
$
24.0

 
$
122.9

 
$
115.1

 
$
520.4

Less: Net income (loss) attributable to noncontrolling interests
 
7.0

 
(1.3
)
 
7.8

 
7.4

Income from continuing operations attributable to common stockholders, before allocation of earnings to participating securities
 
17.0

 
124.2

 
107.3

 
513.0

Less: Earnings from continuing operations allocated to participating securities
 
0.2

 
0.8

 
0.6

 
3.8

Income from continuing operations attributable to common stockholders, after allocation of earnings to participating securities (1)   
 
16.8

 
123.4

 
106.7

 
509.2

Loss from discontinued operations, net of income taxes
 
(43.1
)
 
(81.3
)
 
(66.5
)
 
(92.7
)
Less: Loss from discontinued operations allocated to participating securities (1)
 
—

 
(0.6
)
 
—

 
(0.8
)
Loss from discontinued operations attributable to common stockholders, after allocation of earnings to participating securities
 
(43.1
)
 
(80.7
)
 
(66.5
)
 
(91.9
)
Net (loss) income attributable to common stockholders, after
   allocation of earnings to participating securities (1)
 
$
(26.3
)
 
$
42.7

 
$
40.2

 
$
417.3

 
 
 
 
 
 
 
 
 
EPS denominator:
 
 
 
 
 
 
 
 
Weighted average shares outstanding — basic
 
267.2

 
266.2

 
267.0

 
268.5

Impact of dilutive securities
 
0.5

 
0.6

 
0.5

 
0.7

Weighted average shares outstanding — diluted
 
267.7

 
266.8

 
267.5

 
269.2

 
 
 
 
 
 
 
 
 
Basic EPS attributable to common stockholders:
 
 
 
 
 
 
 
 
Income from continuing operations
 
$
0.06

 
$
0.46

 
$
0.40

 
$
1.89

Loss from discontinued operations
 
(0.16
)
 
(0.30
)
 
(0.25
)
 
(0.34
)
Net (loss) income
 
$
(0.10
)
 
$
0.16

 
$
0.15

 
$
1.55

 
 
 
 
 
 
 
 
 
Diluted EPS attributable to common stockholders:
 
 
 
 
 
 
 
 
Income from continuing operations
 
$
0.06

 
$
0.46

 
$
0.40

 
$
1.89

Loss from discontinued operations
 
(0.16
)
 
(0.30
)
 
(0.25
)
 
(0.34
)
Net (loss) income
 
$
(0.10
)
 
$
0.16

 
$
0.15

 
$
1.55

(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 periods presented.