Segment Data - Financial Information for Company's Segments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	$ 460	$ 647	$ 1,178	$ 759
Acquisitions and other restructurings	(90)	(142)	(281)	(600)
Operating Segments
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	1,230	1,148	3,533	2,938
Operating Segments | Medical
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	744	732	2,008	1,943
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	304	241	902	893
Operating Segments | Interventional
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	183	175	623	102
Segment Reconciling Items
Segment Reporting Information [Line Items]
Acquisitions and other restructurings	(90)	(142)	(281)	(600)
Net interest expense	(154)	(174)	(490)	(470)
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	$ (526)	$ (184)	$ (1,584)	$ (1,110)