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Discontinued Operations and Held-For-Sale Businesses (Schedule of Disposal Groups, Including Discontinued Operations) (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 10 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2016 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Jun. 30, 2014 | Dec. 31, 2016 | Oct. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Allowance for Doubtful Accounts |  |  |  |  |  |  | $ 8,000,000 |  |  |  |  |  |  | $ 8,000,000 |  |
Disposal Group, Including Discontinued Operation, Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,255,000,000 |
Income tax expense |  |  |  |  |  |  |  |  |  |  |  | $ (9,000,000) |  | (7,000,000) | 71,000,000 |
Income (loss) from operations of discontinued businesses, after income tax |  |  |  |  |  |  |  |  |  |  |  | (19,000,000) |  | (25,000,000) | 111,000,000 |
Net loss from disposal and impairments of discontinued businesses, after income tax |  |  |  |  |  |  |  |  |  |  |  | (1,119,000,000) |  | 0 | (55,000,000) |
Disposal Group, Including Discontinued Operation, Assets |  |  |  |  |  |  | 1,306,000,000 |  |  |  |  |  | $ 0 | 1,306,000,000 |  |
Disposal Group, Including Discontinued Operation, Liabilities | [1] |  |  |  |  |  | 784,000,000 |  |  |  |  |  |  | 784,000,000 |  |
Disposal Group, Including Discontinued Operation, Costs of Goods Sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,078,000,000) |
Impairment Expense Pre Tax Total |  |  | $ (625,000,000) | $ (79,000,000) | $ (235,000,000) | $ (159,000,000) | (326,000,000) | $ (231,000,000) | $ (37,000,000) | $ (8,000,000) |  |  |  |  |  |
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 131,000,000 |
Discontinued Operation, Tax Effect of Discontinued Operation |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (75,000,000) |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  |  | (1,138,000,000) |  | (25,000,000) | 64,000,000 |
Asset Impairment Charges |  |  |  |  |  |  |  |  |  |  |  | 1,098,000,000 |  | 602,000,000 | 383,000,000 |
Sul Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Provided by (Used in) Operating Activities, Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  | 58,000,000 |  | (15,000,000) | 15,000,000 |
Disposal Group, Including Discontinued Operation, Revenue |  |  |  |  |  |  |  |  |  |  |  | 701,000,000 |  | 808,000,000 |  |
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents |  |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  | 5,000,000 |  |
Net loss from disposal and impairments of discontinued businesses, after income tax |  | $ (382,000,000) |  |  |  |  |  |  |  |  |  |  | $ (737,000,000) |  |  |
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net |  |  |  |  |  |  | 171,000,000 |  |  |  |  |  |  | 171,000,000 |  |
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment |  |  |  |  |  |  | 668,000,000 |  |  |  |  |  |  | 668,000,000 |  |
Disposal Group, Including Discontinued Operation, Deferred Tax Assets |  |  |  |  |  |  | 133,000,000 |  |  |  |  |  |  | 133,000,000 |  |
Disposal Group, Including Discontinued Operation, Other Assets |  |  |  |  |  |  | 233,000,000 |  |  |  |  |  |  | 233,000,000 |  |
Disposal Group, Including Discontinued Operation, Accounts Payable |  |  |  |  |  |  | 150,000,000 |  |  |  |  |  |  | 150,000,000 |  |
Disposal Group, Including Discontinued Operation, Accrued Liabilities |  |  |  |  |  |  | 150,000,000 |  |  |  |  |  |  | 150,000,000 |  |
Non Recourse Debt Held For Sale Or Discontinued Operations |  |  |  |  |  |  | 346,000,000 |  |  |  |  |  |  | 346,000,000 |  |
Disposal Group, Including Discontinued Operation, Other Liabilities |  |  |  |  |  |  | 125,000,000 |  |  |  |  |  |  | 125,000,000 |  |
Disposal Group, Including Discontinued Operation, Costs of Goods Sold |  |  |  |  |  |  |  |  |  |  |  | (672,000,000) |  | (800,000,000) |  |
Disposal Group, Including Discontinued Operation, Other Expense |  |  |  |  |  |  |  |  |  |  |  | (57,000,000) |  | (40,000,000) |  |
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax |  |  |  |  |  |  |  |  |  |  |  | (1,413,000,000) |  | (32,000,000) | 133,000,000 |
Discontinued Operation, Tax Effect of Discontinued Operation |  |  |  |  |  |  |  |  |  |  |  | 275,000,000 |  | 7,000,000 |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  |  | (1,138,000,000) |  | (25,000,000) |  |
Cash Provided by (Used in) Investing Activities, Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  | $ (54,000,000) |  | (25,000,000) | $ (123,000,000) |
Discontinued Operations [Member] | Sul Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Assets |  |  |  |  |  |  | 1,210,000,000 |  |  |  |  |  |  | 1,210,000,000 |  |
Disposal Group, Including Discontinued Operation, Liabilities |  |  |  |  |  |  | 771,000,000 |  |  |  |  |  |  | 771,000,000 |  |
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Assets | [2] |  |  |  |  |  | 96,000,000 |  |  |  |  |  |  | 96,000,000 |  |
Disposal Group, Including Discontinued Operation, Liabilities | [2] |  |  |  |  |  | $ 13,000,000 |  |  |  |  |  |  | $ 13,000,000 |  |
Sonel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Divestiture Of Ownership In Subsidiary Percent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 56.00%
Cameroon |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  |  |  |  |  |  |  | $ 101,000,000 |  |  |  |  |
[1] | Amounts were classified as both current and long-term on the Consolidated Balance Sheet as of December 31, 2015.
[2] | DPLER and Kelanitissa were classified as held-for-sale as of December 31, 2015. See Note 23—Dispositions for further information.

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