Guarantees (Details) - USD ($) $ in Millions |
12 Months Ended | |
---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
|
Guarantor Obligations [Line Items] | ||
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 | |
Movement in Standard Product Warranty Accrual [Roll Forward] | ||
Balance at beginning of period | $ 156 | $ 197 |
Accruals for warranties issued during the period | 71 | 78 |
Accruals from acquisitions and divestitures | 0 | 1 |
Accruals related to pre-existing warranties (including changes in estimates) | 9 | (39) |
Standard Product Warranty Accrual, Decrease for Payments | (71) | (79) |
Currency translation | 2 | (2) |
Balance at end of period | $ 167 | $ 156 |