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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Income Tax Contingency [Line Items] |  |  |
Release of valuation allowance | $ 8 | $ 6 | $ 38
Change in tax rates | 1 | 10 | 4
Impact of GILTI and FDII | 6 | 4 | (2)
Income tax benefit related to release of valuation allowance |  |  | 25
Deferred foreign income tax benefit | 30 | 5 | 28
Reinvested earnings at foreign subsidiaries | 264 |  |
Accrued interest and penalties | 4 | 4 |
Uncertain income tax position not recognized | 7 | 12 |
Decrease in uncertain tax positions resulting from ongoing audits and settlements | 1 |  |
France Tax Authority |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforward | 40 |  |
Spain Tax Authority |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforward | 17 |  |
Foreign Tax Authority |  |  |
Income Tax Contingency [Line Items] |  |  |
Release of valuation allowance | 8 | 6 |
Change in tax rates |  | $ 10 |
Release of valuation allowance |  |  | 33
Deferred tax assets, tax credit carryforwards, foreign |  |  | 10
Deferred foreign income tax benefit |  |  | $ 15
Foreign tax credit carryforward | 12 |  |
Domestic Tax Authority |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforward | $ 0 |  |

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=123427490&loc=d3e32059-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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