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Guarantees - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2016
Guarantor Obligations [Line Items] |  |
Post sale contingent tax indemnification liabilities | $ 255 | $ 290
Maximum length, in years, of a product warranty for it to be recorded in other current liabilities | 1 year |
Minimum length, in years, of a product warranty for it to be recorded in other noncurrent liabilities | 1 year |
Business Divestitures, Not Specific [Member] |  |
Guarantor Obligations [Line Items] |  |
Post sale contingent tax indemnification liabilities | $ 235 |

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- Definition Maximum length, in years, of a product warranty for it to be recorded in other current liabilities. + References No definition available. + Details
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- Definition Minimum length, in years, of a product warranty for it to be recorded in other noncurrent liabilities. + References No definition available. + Details
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- Definition Post sale contingent tax indemnification liabilities + References No definition available. + 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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- Details
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Namespace Prefix: |
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