Taxes (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income taxes	$ 7	$ 98
Effective income tax rate	5.00%	23.00%
Income tax benefit related to discrete tax items	$ 57
Income taxes benefit related to discrete tax items (in dollars per share)	$ 0.10
Income tax benefit related to discrete tax items, as a percent	16.00%
Unfavorable impact of Russia divestiture, percentage impact		2.00%

Effective Income Tax Rate Reconciliation, Nondeductible Expense, Per Share

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Unfavorable Impact of Russia Divestiture, Percentage Impact

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage 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 nondeductible expenses.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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