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Stock Based Compensation Stock Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2013
Stock-based Compensation [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

 
 
 
 Weighted-
 
Number of
 
 Average Exercise
 
Shares
 
Price Per Share
 
(in millions, except per share data)
Outstanding at January 1, 2011
5.0

 
$
25.01

Options granted
—

 
—

Options exercised
(0.5
)
 
8.69

Options canceled
(0.6
)
 
26.96

Outstanding at December 31, 2011
3.9

 
$
26.95

Options granted
0.2

 
9.19

Options exercised
(0.1
)
 
2.81

Options canceled
(1.0
)
 
25.12

Outstanding at December 31, 2012
3.0

 
$
27.08

Options granted
—

 
—

Options exercised
(0.1
)
 
10.59

Options canceled
(0.9
)
 
24.28

Outstanding at December 31, 2013
2.0

 
$
29.22

 
 
 
 
Exercisable at December 31, 2011
3.8

 
$
27.25

Exercisable at December 31, 2012
2.8

 
$
28.02

Exercisable at December 31, 2013
2.0

 
$
29.22
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

 
 
 
 
Weighted-
 
 
 
 
 
Weighted-
Range of
 
Stock Options
 
Average Exercise
 
Weighted-Average
 
Stock Options
 
Average Exercise
Exercise Prices
 
Outstanding
 
Price Per Share
 
Contractual Life
 
Exercisable
 
Price Per Share
 
 
(in millions, except per share data)
 
 
(in years)
 
(in millions, except per share data)
$9.19 - $15.58
 
0.4

 
$
13.35

 
3.9
 
0.4

 
$
13.35

$19.54 - $26.65
 
0.6

 
26.07

 
2.3
 
0.6

 
26.07

$33.71 - $40.83
 
1.0

 
38.53

 
0.1
 
1.0

 
38.53

 
 
2.0

 
$
29.22

 
1.6
 
2.0

 
$
29.22
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

 
2012
Expected volatility
47.00
%
Risk-free interest rate
1.17
%
Dividend yield
—
%
Expected life of options
6 years

Weighted-average grant-date fair value
$
4.18
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

 
 
 
Weighted Average
 
Number of
 
Grant Date Fair
 
Shares/Units
 
Value per Share/Unit
 
(in millions, except per share data)
Outstanding at January 1, 2011
2.8

 
$
13.48

    Granted
—

 
—

    Vested
(1.1
)
 
17.41

    Canceled
(0.1
)
 
10.68

Outstanding at December 31, 2011
1.6

 
$
10.74

    Granted
1.0

 
10.31

    Vested
(1.4
)
 
10.19

    Canceled
(0.1
)
 
26.02

Outstanding at December 31, 2012
1.1

 
$
11.08

    Granted
0.9

 
12.79

    Vested
(0.7
)
 
11.06

    Canceled
—

 
—

Outstanding at December 31, 2013
1.3

 
$
12.24