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Stock-Based Compensation (Stock Awards) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 3 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 0 Months Ended | 0 Months Ended | ||||||||||||||||||||
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May 20, 2014
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Mar. 27, 2014
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Mar. 20, 2014
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Mar. 03, 2014
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Aug. 02, 2014
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Aug. 03, 2013
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Aug. 02, 2014
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Aug. 03, 2013
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Mar. 27, 2014
Stock Options [Member]
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Mar. 20, 2014
Stock Options [Member]
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Aug. 02, 2014
Stock Options [Member]
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Mar. 27, 2014
Stock Options [Member]
Performance-based [Member]
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Mar. 20, 2014
Stock Options [Member]
Performance-based [Member]
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Aug. 02, 2014
Stock Options [Member]
Performance-based [Member]
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May 20, 2014
Restricted Stock Units (RSUs) [Member]
Time-based [Member]
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Mar. 27, 2014
Restricted Stock Units (RSUs) [Member]
Time-based [Member]
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Mar. 20, 2014
Restricted Stock Units (RSUs) [Member]
Time-based [Member]
|
Mar. 03, 2014
Restricted Stock Units (RSUs) [Member]
Time-based [Member]
|
Aug. 02, 2014
Restricted Stock Units (RSUs) [Member]
Time-based [Member]
|
Mar. 27, 2014
Restricted Stock Units (RSUs) [Member]
Performance-based [Member]
|
Mar. 20, 2014
Restricted Stock Units (RSUs) [Member]
Performance-based [Member]
|
Aug. 02, 2014
Restricted Stock Units (RSUs) [Member]
Performance-based [Member]
|
Mar. 20, 2014
Phantom Shares [Member]
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Aug. 02, 2014
Phantom Shares [Member]
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May 22, 2014
Director [Member]
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Aug. 02, 2014
2014 Long-Term Incentive Plan [Member]
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May 18, 2012
2014 Long-Term Incentive Plan [Member]
Stock Awards [Member]
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May 18, 2012
2014 Long-Term Incentive Plan [Member]
Options [Member]
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May 21, 2014
2014 Equity Inducement Plan [Member]
Restricted Stock Units (RSUs) [Member]
|
May 20, 2014
2014 Equity Inducement Plan [Member]
Restricted Stock Units (RSUs) [Member]
Time-based [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||||||||||||||
| Stock awards, number of shares authorized | 16,000,000 | 32,000,000 | 750,000 | |||||||||||||||||||||||||||||||
| Stock awards, number of shares available for grant | 25,200,000 | |||||||||||||||||||||||||||||||||
| Stock-based compensation expense | $ 11 | $ 18 | $ 21 | $ 32 | ||||||||||||||||||||||||||||||
| Granted, stock awards | 306,000 | [1] | 84,000 | 2,328,000 | 25,000 | 2,743,000 | 0 | 329,000 | 329,000 | 2,300,000 | 157,000 | 224,000 | [1] | |||||||||||||||||||||
| Granted, stock options | 185,000 | 2,322,000 | 2,507,000 | |||||||||||||||||||||||||||||||
| Granted, weighted-average exercise price (in dollars per share) | $ 8.97 | $ 8.36 | $ 8.41 | |||||||||||||||||||||||||||||||
| Granted, weighted average grant date fair value (in dollars per share) | $ 8.93 | $ 5.59 | $ 6.09 | $ 7.96 | $ 6.23 | $ 8.60 | ||||||||||||||||||||||||||||
| Maximum award settlement (in dollars per share) | $ 16.72 | |||||||||||||||||||||||||||||||||
| Stock awards, fair value remeasured at period end (in dollars per share) | $ 9.63 | |||||||||||||||||||||||||||||||||
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