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STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Equity RSUs and PSUs) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Performance Shares [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percent Addition or Reduction In Restricted Stock Units If Performance Is Below Level Defined In Agreement | 25.00% |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |
Granted in period (number of RSUs and PSUs) | 1,500,000 | 755,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures |  |  | 344,000
Performance Shares [Member] | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Performance Share Unit Payout | 175.00% | 200.00% |
Performance Shares [Member] | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance Share Unit Payout | 0.00% | 0.00% |
Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  | 3 years |
Restricted Stock Units (RSUs) and Performance Share Units (PSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |
Balance at beginning of period (in number of RSUs and PSUs) | 7,220,300 |  |
Granted in period (number of RSUs and PSUs) | 3,557,366 |  |
Vested in Period (number of RSUs and PSUs) | (3,042,860) |  |
Forfeited in Period (number of RSUs and PSUs) | (516,579) |  |
Balance at end of period (in number of RSUs and PSUs) | 7,218,227 | 7,220,300 |
Beginning Balance - weighted average grant date fair value | $ 27.12 |  |
Granted - Weighted average grant date fair value | 10.46 |  |
Vested - weighted average grant date fair value | 28.81 |  |
Forfeited - weighted average grant date fair value | 25.91 |  |
Ending balance - weighted average grant date fair value | $ 18.08 | $ 27.12 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding | $ 95 |  |
Fair value of RSUs and PSUs granted | 37 | $ 46 | $ 67
Intrinsic value of RSUs and PSUs vested | 22 | $ 22 | $ 15
Total unrecognized compensation cost related to unvested RSUs and PSUs expected to be recognized over a weighted-average period | $ 15 |  |
Weighted-average period used in calculating unrecognized compensation cost, RSUs and PSUs (in years) | 1 year 11 months |  |
Outside Directors [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 1 year |  |
Outside Directors [Member] | Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  | 4 years |
Share Based Compensation Award Tranches Two and Three [Member] | Performance Shares [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |
Granted in period (number of RSUs and PSUs) | 993,000 |  |

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