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Intangible Assets - Reconciliation of Goodwill by Business Segment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 24,621 $ 23,886
Goodwill, Acquired During Period   1,073
Goodwill, Purchase Accounting Adjustments 13 (1)
Goodwill, Foreign Currency Translation Gain (Loss) 105 (337)
Goodwill, Written off Related to Sale of Business Unit (218)  
Goodwill, ending balance 24,522 24,621
Medical    
Goodwill [Roll Forward]    
Goodwill, beginning balance 10,909 10,240
Goodwill, Acquired During Period   814
Goodwill, Purchase Accounting Adjustments 13 1
Goodwill, Foreign Currency Translation Gain (Loss) 33 (145)
Goodwill, Written off Related to Sale of Business Unit 0  
Goodwill, ending balance 10,955 10,909
Life Sciences    
Goodwill [Roll Forward]    
Goodwill, beginning balance 888 836
Goodwill, Acquired During Period   71
Goodwill, Purchase Accounting Adjustments 0 0
Goodwill, Foreign Currency Translation Gain (Loss) 9 (20)
Goodwill, Written off Related to Sale of Business Unit 0  
Goodwill, ending balance 897 888
Interventional    
Goodwill [Roll Forward]    
Goodwill, beginning balance 12,824 12,810
Goodwill, Acquired During Period   188
Goodwill, Purchase Accounting Adjustments 0 (2)
Goodwill, Foreign Currency Translation Gain (Loss) 64 (171)
Goodwill, Written off Related to Sale of Business Unit (218)  
Goodwill, ending balance $ 12,670 $ 12,824