Segment Data - Revenues by Geographic Areas (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 5,315	$ 4,225
Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	2,261	2,090
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	1,979	1,123
Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	1,075	1,012
United States
Segment Reporting Information [Line Items]
Revenues	3,130	2,430
United States | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	1,274	1,204
United States | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	1,134	538
United States | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	722	688
International
Segment Reporting Information [Line Items]
Revenues	2,186	1,795
International | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	988	886
International | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	845	585
International | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	353	325
Medication Delivery Solutions | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	1,008	948
Medication Delivery Solutions | United States | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	568	520
Medication Delivery Solutions | International | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	440	428
Medication Management Solutions | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	630	575
Medication Management Solutions | United States | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	477	462
Medication Management Solutions | International | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	152	113
Diabetes Care | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	285	268
Diabetes Care | United States | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	150	139
Diabetes Care | International | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	136	129
Pharmaceutical Systems | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	339	299
Pharmaceutical Systems | United States | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	79	84
Pharmaceutical Systems | International | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	260	215
Integrated Diagnostic Solutions | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	1,667	800
Integrated Diagnostic Solutions | United States | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	1,014	386
Integrated Diagnostic Solutions | International | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	653	414
Biosciences | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	312	323
Biosciences | United States | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	120	152
Biosciences | International | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	192	171
Surgery | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	332	326
Surgery | United States | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	262	256
Surgery | International | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	70	70
Peripheral Intervention | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	426	395
Peripheral Intervention | United States | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	232	225
Peripheral Intervention | International | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	193	170
Urology and Critical Care | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	317	291
Urology and Critical Care | United States | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	228	206
Urology and Critical Care | International | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	$ 89	$ 85