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Receivables, Loans, Notes Receivable, and Others (Tables)
6 Months Ended
Mar. 31, 2022
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable
Accounts receivable, net consisted of the following (in millions):
March 31, 2022September 30, 2021
Accounts receivable$5,768 $5,723 
Less: Allowance for expected credit losses(79)(110)
Accounts receivable, net$5,689 $5,613 
Accounts Receivable, Allowance for Credit Loss
The changes in the allowance for expected credit losses related to accounts receivable were as follows (in millions):
Six Months Ended
March 31,
20222021
Balance at beginning of period$110 $173 
Provision (benefit) for expected credit losses(7)
Write-offs charged against the allowance for expected credit losses(20)(32)
Other(4)
Balance at end of period
$79 $148