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Plant Closures (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Property, Plant and Equipment [Abstract] |  |  |
Accelerated depreciation | $ 136 | $ 387 | $ 566
Completed Plant |  |  |
Accelerated depreciation | 136 | $ 387 | $ 566
Property, Plant, and Equipment, Owned, Accumulated Depreciation | $ 1,100 |  |
Property, Plant and Equipment [Member] |  |  |
Completed Plant |  |  |
Property, Plant and Equipment, Dispositions | 4 million | 11 million | 151 million
Property, Plant and Equipment, Disposals | $ 1 | $ 2 | $ 19

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- Definition Accelerated depreciation + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of divestiture of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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- Definition Describes an entity's accounting treatment for disposals of property, plant and equipment, including gains and losses related thereto. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27011434&loc=d3e125663-122742 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The cumulative amount of depreciation (related to long-lived, depreciable flight assets owned by the entity and used in the entity's principle business operations and capitalized assets classified as property, plant and equipment that are owned by the entity) that has been recognized in the income statement. + References No definition available. + Details
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- Details
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