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v3.23.1

Income Taxes - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Sep. 30, 2022
Income Tax Examination [Line Items] |  |  |  |  |
Effective income tax rate | 22.00% | 52.70% | 16.00% | 21.50% |
Gross tax effected unrecognized tax benefits |  |  |  |  | $ 2,537
Amount of unrecognized tax benefits which may impact effective tax rate |  |  |  |  | 1,973
Total net accrued interest, net of tax benefit |  |  |  |  | $ 284
Unrecognized tax benefits, income tax penalties and interest expense |  |  | $ 56 | $ 30 |
Restructuring and impairment costs | $ 418 | $ 384 | 763 | 433 |
Restructuring charges, tax benefit | $ 35 | 7 | $ 87 | 14 |
Effective income tax rate reconciliation, repatriation of foreign earnings, amount |  | $ 13 |  | $ 13 |
IRELAND |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |
Ireland statutory income tax rate | 12.50% | 12.50% | 12.50% | 12.50% |

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