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Restructuring and Asset Related Charges - Net (2017 Restructuring Program schedule) (Details) - USD ($) $ in Millions | 1 Months Ended | 2 Months Ended | 3 Months Ended | 8 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 30, 2017 | Aug. 31, 2017 | Sep. 30, 2016 | Aug. 31, 2017 | Sep. 30, 2016
Predecessor |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  |  | $ 11 | $ 172 | $ 323 | $ 162
Predecessor | 2017 Restructuring Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  |  |  |  | 313 |
Payments for Restructuring |  |  |  |  | (8) |
Restructuring reserve, asset write-offs |  |  |  |  | (279) |
Restructuring Reserve |  |  | 26 |  | 26 |
Predecessor | Severance and Related Benefit Costs [Member] | 2017 Restructuring Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  |  | 1 |  | 34 |
Payments for Restructuring |  |  |  |  | (8) |
Restructuring reserve, asset write-offs |  |  |  |  | 0 |
Restructuring Reserve |  |  | 26 |  | 26 |
Predecessor | Asset Related Charges [Member] | 2017 Restructuring Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net | [1] |  |  |  | 279 |
Payments for Restructuring | [1] |  |  |  | 0 |
Restructuring reserve, asset write-offs | [1] |  |  |  | (279) |
Restructuring Reserve | [1] |  | $ 0 |  | $ 0 |
Successor |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  | $ 40 |  |  |  |
Successor | 2017 Restructuring Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  | 0 |  |  |  |
Payments for Restructuring |  | (1) |  |  |  |
Restructuring Reserve |  | 25 |  |  |  |
Successor | Severance and Related Benefit Costs [Member] | 2017 Restructuring Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  | 0 |  |  |  |
Payments for Restructuring |  | (1) |  |  |  |
Restructuring Reserve |  | 25 |  |  |  |
Successor | Asset Related Charges [Member] | 2017 Restructuring Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net | [1] | 0 |  |  |  |
Payments for Restructuring | [1] | 0 |  |  |  |
Restructuring Reserve | [1] | $ 0 |  |  |  |
[1] | Includes accelerated depreciation related to site closure. Charge for accelerated depreciation represents the difference between the depreciation expense to be recognized over the revised useful life of the site, based upon the anticipated date the site will be closed and depreciation expense as determined utilizing the useful life prior to the restructuring action.

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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