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Note 9, Equity and Noncontrolling Interests Changes in Equity and NCI (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Sep. 30, 2016 | Sep. 30, 2015
Changes In Shareholder's Equity [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | $ 3,927 |  | $ 3,927 |  | $ 4,210 |
Stockholders' Equity Attributable to Noncontrolling Interest | 147 |  | 147 |  | 131 |
Net Income (Loss) Attributable to Parent | 204 | $ (14) | 545 | $ (656) |  |
Foreign Currency Translation Adjustment | 131 | (85) | (226) | (52) |  |
Dividends Attributable to Noncontrolling Interest |  |  | (47) | (34) |  |
Common Stock [Member] |  |  |  |  |  |
Changes In Shareholder's Equity [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 0 | 0 | 0 | 0 | 0 | $ 0
Net Income (Loss) Attributable to Parent |  |  | 0 | 0 |  |
Foreign Currency Translation Adjustment |  |  | 0 | 0 |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |  |  | 0 | 0 |  |
Dividends |  |  | 0 |  |  |
Change In Parent Net Investment |  |  | 0 | 0 |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  | 0 | 0 |  |
Dividends Attributable to Noncontrolling Interest |  |  | 0 | 0 |  |
Stock Repurchased During Period, Value |  |  | 0 |  |  |
Proceeds from Contributions from Parent |  |  | 0 |  |  |
Reclass of Parent Net Investment And Issuance of Shares With Separation |  |  | 0 |  |  |
Change in Noncontrolling Interest Share |  |  | 0 |  |  |
Additional Paid-in Capital [Member] |  |  |  |  |  |
Changes In Shareholder's Equity [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 3,966 | 0 | 3,966 | 0 | 0 | 0
Net Income (Loss) Attributable to Parent |  |  | 0 | 0 |  |
Foreign Currency Translation Adjustment |  |  | 0 | 0 |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |  |  | 0 | 0 |  |
Dividends |  |  | 0 |  |  |
Change In Parent Net Investment |  |  | 0 | 0 |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  | 0 | 0 |  |
Dividends Attributable to Noncontrolling Interest |  |  | 0 | 0 |  |
Stock Repurchased During Period, Value |  |  | 40 |  |  |
Proceeds from Contributions from Parent |  |  | 326 |  |  |
Reclass of Parent Net Investment And Issuance of Shares With Separation |  |  | 3,671 |  |  |
Change in Noncontrolling Interest Share |  |  | 9 |  |  |
Retained Earnings [Member] |  |  |  |  |  |
Changes In Shareholder's Equity [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 454 | 0 | 454 | 0 | 0 | 0
Net Income (Loss) Attributable to Parent |  |  | 480 | 0 |  |
Foreign Currency Translation Adjustment |  |  | 0 | 0 |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |  |  | 0 | 0 |  |
Dividends |  |  | 26 |  |  |
Change In Parent Net Investment |  |  | 0 | 0 |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  | 0 | 0 |  |
Dividends Attributable to Noncontrolling Interest |  |  | 0 | 0 |  |
Stock Repurchased During Period, Value |  |  | 0 |  |  |
Proceeds from Contributions from Parent |  |  | 0 |  |  |
Reclass of Parent Net Investment And Issuance of Shares With Separation |  |  | 0 |  |  |
Change in Noncontrolling Interest Share |  |  | 0 |  |  |
Parent Net Investment [Member] |  |  |  |  |  |
Changes In Shareholder's Equity [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 0 | 5,137 | 0 | 5,137 | 4,486 | 5,873
Net Income (Loss) Attributable to Parent |  |  | 65 | (656) |  |
Foreign Currency Translation Adjustment |  |  | 0 | 0 |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |  |  | 0 | 0 |  |
Dividends |  |  | 0 |  |  |
Change In Parent Net Investment |  |  | (880) | (80) |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  | 0 | 0 |  |
Dividends Attributable to Noncontrolling Interest |  |  | 0 | 0 |  |
Stock Repurchased During Period, Value |  |  | 0 |  |  |
Proceeds from Contributions from Parent |  |  | 0 |  |  |
Reclass of Parent Net Investment And Issuance of Shares With Separation |  |  | (3,671) |  |  |
Change in Noncontrolling Interest Share |  |  | 0 |  |  |
Parent [Member] |  |  |  |  |  |
Changes In Shareholder's Equity [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 3,927 | 4,848 | 3,927 | 4,848 | 4,210 | 5,626
Net Income (Loss) Attributable to Parent |  |  | 545 | (656) |  |
Foreign Currency Translation Adjustment |  |  | (229) | (54) |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |  |  | 12 | 12 |  |
Dividends |  |  | 26 |  |  |
Change In Parent Net Investment |  |  | (880) | (80) |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  | 0 | 0 |  |
Dividends Attributable to Noncontrolling Interest |  |  | 0 | 0 |  |
Stock Repurchased During Period, Value |  |  | 40 |  |  |
Proceeds from Contributions from Parent |  |  | 326 |  |  |
Reclass of Parent Net Investment And Issuance of Shares With Separation |  |  | 0 |  |  |
Change in Noncontrolling Interest Share |  |  | 9 |  |  |
Noncontrolling Interest [Member] |  |  |  |  |  |
Changes In Shareholder's Equity [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | 147 | 131 | 147 | 131 | 131 | 141
Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Nonredeemable |  |  | 50 | 42 |  |
Foreign Currency Translation Adjustment |  |  | 2 | 1 |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |  |  | 0 | 0 |  |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders |  |  | 0 |  |  |
Change In Parent Net Investment |  |  | 0 | 0 |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  | 5 | 2 |  |
Dividends Attributable to Noncontrolling Interest |  |  | (41) | (55) |  |
Stock Repurchased During Period, Value |  |  | 0 |  |  |
Proceeds from Contributions from Parent |  |  | 0 |  |  |
Reclass of Parent Net Investment And Issuance of Shares With Separation |  |  | 0 |  |  |
Change in Noncontrolling Interest Share |  |  | 0 |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |
Changes In Shareholder's Equity [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 4,074 | 4,979 | 4,074 | 4,979 | 4,341 | 5,767
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest |  |  | 595 | (614) |  |
Foreign Currency Translation Adjustment |  |  | (227) | (53) |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |  |  | 12 | 12 |  |
Dividends |  |  | 26 |  |  |
Change In Parent Net Investment |  |  | (880) | (80) |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  | 5 | 2 |  |
Dividends Attributable to Noncontrolling Interest |  |  | (41) | (55) |  |
Stock Repurchased During Period, Value |  |  | 40 |  |  |
Proceeds from Contributions from Parent |  |  | 326 |  |  |
Reclass of Parent Net Investment And Issuance of Shares With Separation |  |  | 0 |  |  |
Change in Noncontrolling Interest Share |  |  | 9 |  |  |
Other Comprehensive Income (Loss) [Member] |  |  |  |  |  |
Changes In Shareholder's Equity [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | (493) | (289) | (493) | (289) | $ (276) | $ (247)
Net Income (Loss) Attributable to Parent |  |  | 0 | 0 |  |
Foreign Currency Translation Adjustment | $ 130 | $ (85) | (229) | (54) |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax |  |  | 12 | 12 |  |
Dividends |  |  | 0 |  |  |
Change In Parent Net Investment |  |  | 0 | 0 |  |
Noncontrolling Interest, Period Increase (Decrease) |  |  | 0 | 0 |  |
Dividends Attributable to Noncontrolling Interest |  |  | 0 | $ 0 |  |
Stock Repurchased During Period, Value |  |  | 0 |  |  |
Proceeds from Contributions from Parent |  |  | 0 |  |  |
Reclass of Parent Net Investment And Issuance of Shares With Separation |  |  | 0 |  |  |
Change in Noncontrolling Interest Share |  |  | $ 0 |  |  |

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