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

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