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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 | Aug. 31, 2013 | Dec. 31, 2015 | Dec. 31, 2014
Successor [Member] | Allowance for Doubtful Accounts, Current [Member] |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Beginning Balance |  |  | $ 11 | $ 6
Additions | $ 6 |  | 4 | 5
Net Deductions and Other |  |  | 5 |
Ending Balance | 6 |  | 10 | 11
Successor [Member] | Valuation Allowance of Deferred Tax Assets [Member] |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Beginning Balance | 1,273 |  | 1,127 | 953
Additions | 157 |  | 182 | 257
Net Deductions and Other | 477 |  | 108 | 83
Ending Balance | 953 | $ 1,273 | $ 1,201 | $ 1,127
Predecessor [Member] | Allowance for Doubtful Accounts, Current [Member] |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Beginning Balance | 22 | 30 |  |
Net Deductions and Other |  | 8 |  |
Ending Balance |  | 22 |  |
Predecessor [Member] | Valuation Allowance of Deferred Tax Assets [Member] |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Beginning Balance | $ 1,273 | 2,838 |  |
Additions |  | 180 |  |
Net Deductions and Other |  | 1,745 |  |
Ending Balance |  | $ 1,273 |  |

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