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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 | 9 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended | 0 Months Ended | 2 Months Ended | 0 Months Ended | ||||||||||||||||||||||
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Aug. 19, 2014
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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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Nov. 01, 2014
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Nov. 02, 2013
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Nov. 01, 2014
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Nov. 02, 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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Nov. 01, 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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Nov. 01, 2014
Stock Options [Member]
Performance-based [Member]
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Aug. 19, 2014
Restricted Stock Units (RSUs) [Member]
Time-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]
|
Nov. 01, 2014
Restricted Stock Units (RSUs) [Member]
Time-based [Member]
|
Mar. 27, 2014
Restricted Stock Units (RSUs) [Member]
Performance-based [Member]
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Mar. 20, 2014
Restricted Stock Units (RSUs) [Member]
Performance-based [Member]
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Nov. 01, 2014
Restricted Stock Units (RSUs) [Member]
Performance-based [Member]
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Mar. 20, 2014
Phantom Shares [Member]
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Nov. 01, 2014
Phantom Shares [Member]
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May 22, 2014
Director [Member]
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Oct. 09, 2014
Director [Member]
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Nov. 01, 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]
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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 | 24,000,000 | ||||||||||||||||||||||||||||||||||||
| Stock-based compensation expense | $ 10 | $ 7 | $ 31 | $ 39 | |||||||||||||||||||||||||||||||||
| Granted, stock awards | 883,000 | 306,000 | [1] | 84,000 | 2,328,000 | 25,000 | 3,626,000 | 0 | 329,000 | 329,000 | 2,300,000 | 157,000 | 13,000 | 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) | $ 10.25 | $ 8.93 | $ 5.59 | $ 6.09 | $ 7.96 | $ 6.78 | $ 8.60 | $ 7.64 | |||||||||||||||||||||||||||||
| Maximum award settlement (in dollars per share) | $ 16.72 | ||||||||||||||||||||||||||||||||||||
| Stock awards, fair value remeasured at period end (in dollars per share) | $ 7.61 | ||||||||||||||||||||||||||||||||||||
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