Segment Data - Revenues by Geographic Areas (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Revenues	$ 5,509	$ 4,990	$ 15,949	$ 14,741
Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	2,927	2,558	8,302	7,237
Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	1,254	1,260	3,798	3,852
Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	1,328	1,240	3,849	3,720
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Revenues	0	(67)	0	(67)
United States
Segment Reporting Information [Line Items]
Revenues	3,181	2,891	9,369	8,546
United States \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	1,743	1,508	5,012	4,297
United States \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	539	546	1,717	1,712
United States \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	898	844	2,640	2,543
United States \| Corporate, Non-Segment
Segment Reporting Information [Line Items]
Revenues	0	(6)	0	(6)
International
Segment Reporting Information [Line Items]
Revenues	2,328	2,098	6,581	6,195
International \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	1,184	1,050	3,290	2,940
International \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	714	714	2,081	2,139
International \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	430	396	1,209	1,177
International \| Corporate, Non-Segment
Segment Reporting Information [Line Items]
Revenues	0	(62)	0	(62)
Medication Delivery Solutions \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	1,132	1,123	3,373	3,282
Medication Delivery Solutions \| United States \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	680	670	2,060	1,971
Medication Delivery Solutions \| International \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	452	453	1,313	1,310
Medication Management Solutions \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	888	840	2,500	2,359
Medication Management Solutions \| United States \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	709	680	2,030	1,883
Medication Management Solutions \| International \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	179	160	470	475
Pharmaceutical Systems \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	629	594	1,622	1,596
Pharmaceutical Systems \| United States \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	178	158	431	442
Pharmaceutical Systems \| International \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	451	437	1,191	1,154
Advanced Patient Monitoring \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	278	0	806	0
Advanced Patient Monitoring \| United States \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	176	0	490	0
Advanced Patient Monitoring \| International \| Operating Segments \| Medical
Segment Reporting Information [Line Items]
Revenues	102	0	317	0
Specimen Management \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	470	467	1,387	1,372
Specimen Management \| United States \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	240	239	721	708
Specimen Management \| International \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	230	228	667	664
Diagnostic Solutions \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	425	429	1,340	1,365
Diagnostic Solutions \| United States \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	154	167	556	578
Diagnostic Solutions \| International \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	271	263	783	787
Biosciences \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	358	363	1,071	1,115
Biosciences \| United States \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	145	141	440	426
Biosciences \| International \| Operating Segments \| Life Sciences
Segment Reporting Information [Line Items]
Revenues	213	222	631	689
Surgery \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	395	376	1,173	1,124
Surgery \| United States \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	294	283	885	851
Surgery \| International \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	101	93	288	273
Peripheral Intervention \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	512	488	1,466	1,431
Peripheral Intervention \| United States \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	271	263	793	762
Peripheral Intervention \| International \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	241	225	673	669
Urology and Critical Care \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	422	375	1,211	1,165
Urology and Critical Care \| United States \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	334	297	962	930
Urology and Critical Care \| International \| Operating Segments \| Interventional
Segment Reporting Information [Line Items]
Revenues	$ 88	$ 78	$ 249	$ 234