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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 15 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2020
Income Tax [Line Items] |  |  |  |  |
Income taxes | $ 158 | $ 123 | $ 390 | $ 399 |
Effective income tax rate | 21.00% | 33.00% | 21.00% | 22.00% |
Payroll tax deferral from CARES Act through December 2020 |  |  |  |  | $ 73
Payroll Taxes Paid |  |  | $ 37 | $ 37 |
Unfavorable impact of Russia divestiture, percentage impact |  | 12.00% |  |  |

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