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Business Restructuring Charges (Detail)
$ in Millions
6 Months Ended
Mar. 31, 2022
USD ($)
Restructuring Reserve [Roll Forward]  
Beginning Balance $ 19
Charged to expense 34
Cash payments (38)
Ending Balance 15
Employee Termination  
Restructuring Reserve [Roll Forward]  
Beginning Balance 14
Charged to expense 4
Cash payments (6)
Ending Balance 12
Other  
Restructuring Reserve [Roll Forward]  
Beginning Balance 5
Charged to expense 30
Cash payments (32)
Ending Balance $ 3