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Income Taxes Components of Provision for Income Taxes on Continuing Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Components of Income Tax [Line Items] |  |  |  |
Income from Continuing Operations before Income Taxes, Domestic |  | $ (259) | $ 261 | $ 335
Current |  |  |  |
U.S. federal |  | (1,025) | 476 | (286)
U.S. state |  | (33) | 26 | (18)
Non-U.S. |  | 213 | 434 | 53
Total |  | (845) | 936 | (251)
Deferred |  |  |  |
U.S. federal |  | 412 | (372) | 523
U.S. state |  | 84 | (10) | 33
Non-U.S. |  | 116 | (357) | 17
Total |  | 612 | (739) | 573
Income tax provision |  | (233) | 197 | 322
Income from Continuing Operations before Income Taxes, Foreign |  | 1,315 | 1,285 | 816
Income Taxes Paid |  | 377 | 81 | 497
Taxes Payable, Current |  | 159 | 336 |
Undistributed Earnings of Foreign Subsidiaries |  | 20,100 |  |
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount | $ (76) | $ (284) | $ 31 | $ (164)

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