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Other Financial Data (Tables)
 12 Months Ended
Sep. 30, 2020
Disclosure Text Block [Abstract]  
Other Items Reported In Earnings
Items reported in earnings during the years ended September 30 included the following:
2018 2019 2020 
Research and development expense$436 454 439 
Depreciation expense$444 463 485 
Rent expense$279 285 239 
Other Assets
Items reported in other noncurrent assets included the following:
2019 2020 
Operating lease right-of-use assets$— 508 
Pension assets$164 265 
Asbestos-related insurance receivables$115 100 
Deferred income taxes$97 99 
Accrued Expenses
Items reported in accrued expenses included the following:
2019 2020 
Customer advances (contract liabilities)$519 583 
Employee compensation$606 577 
Operating lease liabilities (current)$— 148 
Product warranty$140 148 
Other Liabilities
Other liabilities are summarized as follows:
2019 2020 
Pension and postretirement liabilities$775 769 
Operating lease liabilities (noncurrent)— 373 
Deferred income taxes327 261 
Asbestos litigation313 295 
Other556 626 
    Total$1,971 2,324