Segment Data Segment Data - Revenues by Geographic Areas (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 19,372	$ 18,870	$ 19,131
Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	9,502	8,841	8,361
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	5,133	5,564	6,530
Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	4,736	4,464	4,239
United States
Segment Reporting Information [Line Items]
Revenues	11,113	10,722	10,371
United States | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	5,488	4,950	4,544
United States | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	2,377	2,732	2,980
United States | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	3,247	3,040	2,847
Non-US
Segment Reporting Information [Line Items]
Revenues	8,258	8,148	8,760
Non-US | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	4,014	3,891	3,817
Non-US | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	2,756	2,833	3,550
Non-US | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	1,489	1,424	1,392
Medication Delivery Solutions | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	4,293	4,308	4,101
Medication Delivery Solutions | United States | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	2,519	2,483	2,253
Medication Delivery Solutions | Non-US | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	1,774	1,825	1,848
Medication Management Solutions | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	2,980	2,533	2,432
Medication Management Solutions | United States | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	2,303	1,935	1,863
Medication Management Solutions | Non-US | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	677	598	570
Pharmaceutical Systems | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	2,229	2,001	1,828
Pharmaceutical Systems | United States | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	666	533	428
Pharmaceutical Systems | Non-US | Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	1,563	1,468	1,400
Integrated Diagnostic Solutions | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	3,624	4,185	5,225
Integrated Diagnostic Solutions | United States | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	1,774	2,190	2,477
Integrated Diagnostic Solutions | Non-US | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	1,850	1,995	2,748
Biosciences | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	1,509	1,379	1,305
Biosciences | United States | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	603	542	503
Biosciences | Non-US | Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues	906	838	802
Surgery | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	1,497	1,400	1,296
Surgery | United States | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	1,159	1,094	1,023
Surgery | Non-US | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	338	306	274
Peripheral Intervention | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	1,865	1,759	1,711
Peripheral Intervention | United States | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	1,016	960	931
Peripheral Intervention | Non-US | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	849	799	780
Urology and Critical Care | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	1,374	1,305	1,232
Urology and Critical Care | United States | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	1,073	986	894
Urology and Critical Care | Non-US | Operating Segments | Interventional
Segment Reporting Information [Line Items]
Revenues	$ 301	$ 319	$ 338