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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2022
Sep. 30, 2021
Current assets    
Allowance for credit losses on Accounts receivables $ 2 $ 2
Noncurrent assets    
Allowance for credit losses on Asbestos insurance receivable $ 3 $ 3