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Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies Debt Reclassifications Table (Details) - USD ($) $ in Millions | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Other long-term assets | $ 311 | $ 290
Long-term debt, net | 10,062 | 10,311
Scenario, Previously Reported [Member] |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Other long-term assets |  | 333
Long-term debt, net |  | $ 10,354
Restatement Adjustment [Member] |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Other long-term assets | (43) |
Long-term debt, net | $ 43 |

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