| **Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Statement of Comprehsive Income (Details) - USD ($) $ in Millions** | 3 Months Ended | 12 Months Ended |
|---------------------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| Net income (loss)                                                                                                                                 | $ (34)         | $ (34)          | $ 4 | $ (33) | $ (50) | $ (28) | $ (64) | $ (42) | $ (65) | $ (151) | $ (579) |
| **Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]**                                                                    |           |            |   |   |   |   |   |   |   |   |   |
| Foreign currency translation adjustment                                                                                                           |           |            |   |   |   |   |   |   | 7 | (160) | (52) |
| Unrealized gain on marketable securities                                                                                                          |           |            |   |   |   |   |   |   |   |   | 1 |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        |           |            |   |   |   |   |   |   | (46) | (178) | (388) |
| Total other comprehensive income (loss)                                                                                                           |           |            |   |   |   |   |   |   | (39) | (338) | (439) |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest                                                |           |            |   |   |   |   |   |   | (104) | (489) | (1,018) |
| Less: Net income attributable to non-controlling interests                                                                                        |           |            |   |   |   |   |   |   | 32 | 33 | 40 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                                   |           |            |   |   |   |   |   |   | (136) | (522) | (1,058) |
| Parent Company [Member]                                                                                                                           |           |            |   |   |   |   |   |   |   |   |   |
| Net income (loss)                                                                                                                                 |           |            |   |   |   |   |   |   | (97) | (184) | (619) |
| **Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]**                                                                    |           |            |   |   |   |   |   |   |   |   |   |
| Foreign currency translation adjustment                                                                                                           |           |            |   |   |   |   |   |   | 7 | (160) | (52) |
| Unrealized gain on marketable securities                                                                                                          |           |            |   |   |   |   |   |   |   |   | 1 |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        |           |            |   |   |   |   |   |   | (46) | (178) | (388) |
| Total other comprehensive income (loss)                                                                                                           |           |            |   |   |   |   |   |   | (39) | (338) | (439) |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest                                                |           |            |   |   |   |   |   |   | (136) | (522) | (1,058) |
| Less: Net income attributable to non-controlling interests                                                                                        |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                                   |           |            |   |   |   |   |   |   | (136) | (522) | (1,058) |
| Guarantor Subsidiaries [Member]                                                                                                                   |           |            |   |   |   |   |   |   |   |   |   |
| Net income (loss)                                                                                                                                 |           |            |   |   |   |   |   |   | (107) | (238) | (696) |
| **Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]**                                                                    |           |            |   |   |   |   |   |   |   |   |   |
| Foreign currency translation adjustment                                                                                                           |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Unrealized gain on marketable securities                                                                                                          |           |            |   |   |   |   |   |   |   |   | 0 |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        |           |            |   |   |   |   |   |   | 1 | (192) | (397) |
| Total other comprehensive income (loss)                                                                                                           |           |            |   |   |   |   |   |   | 1 | (192) | (397) |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest                                                |           |            |   |   |   |   |   |   | (106) | (430) | (1,093) |
| Less: Net income attributable to non-controlling interests                                                                                        |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                                   |           |            |   |   |   |   |   |   | (106) | (430) | (1,093) |
| Non-Guarantor Subsidiaries [Member]                                                                                                               |           |            |   |   |   |   |   |   |   |   |   |
| Net income (loss)                                                                                                                                 |           |            |   |   |   |   |   |   | 330 | 414 | 61 |
| **Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]**                                                                    |           |            |   |   |   |   |   |   |   |   |   |
| Foreign currency translation adjustment                                                                                                           |           |            |   |   |   |   |   |   | 7 | (160) | (52) |
| Unrealized gain on marketable securities                                                                                                          |           |            |   |   |   |   |   |   |   |   | 1 |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        |           |            |   |   |   |   |   |   | (47) | 14 | 9 |
| Total other comprehensive income (loss)                                                                                                           |           |            |   |   |   |   |   |   | (40) | (146) | (42) |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest                                                |           |            |   |   |   |   |   |   | 290 | 268 | 19 |
| Less: Net income attributable to non-controlling interests                                                                                        |           |            |   |   |   |   |   |   | 32 | 33 | 40 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                                   |           |            |   |   |   |   |   |   | 258 | 235 | (21) |
| Consolidation, Eliminations [Member]                                                                                                              |           |            |   |   |   |   |   |   |   |   |   |
| Net income (loss)                                                                                                                                 |           |            |   |   |   |   |   |   | (191) | (143) | 675 |
| **Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]**                                                                    |           |            |   |   |   |   |   |   |   |   |   |
| Foreign currency translation adjustment                                                                                                           |           |            |   |   |   |   |   |   | (7) | 160 | 52 |
| Unrealized gain on marketable securities                                                                                                          |           |            |   |   |   |   |   |   |   |   | (1) |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        |           |            |   |   |   |   |   |   | 46 | 178 | 388 |
| Total other comprehensive income (loss)                                                                                                           |           |            |   |   |   |   |   |   | 39 | 338 | 439 |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest                                                |           |            |   |   |   |   |   |   | (152) | 195 | 1,114 |
| Less: Net income attributable to non-controlling interests                                                                                        |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                                   |           |            |   |   |   |   |   |   | $ (152) | $ 195 | $ 1,114 |

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| - Definition
Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
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| - Definition
Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.
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| - Definition
Amount of Net Income (Loss) attributable to noncontrolling interest.
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| - Definition
Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities and unrealized holding gain (loss) related to transfers of securities into the available-for-sale classification and out of the held-to-maturity classification.
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| - Definition
Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.
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| - Definition
Amount after tax and reclassification adjustments of other comprehensive income (loss).
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Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.
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