Segment Data - Financial Information for Company's Segments (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Acquisitions and other restructurings	$ 185	$ 309	$ 480
Other Operating Income (Expense), Net	(238)	(363)	(654)
Total Capital Expenditures	1,231	810	957
Total Depreciation and Amortization	2,273	2,154	2,253
Operating Segments
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	5,907	4,403	4,976
Operating Segments | Medical
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	2,583	2,274	2,824
Total Capital Expenditures	777	477	577
Total Depreciation and Amortization	1,140	1,104	1,073
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	2,391	1,405	1,248
Total Capital Expenditures	297	192	230
Total Depreciation and Amortization	352	286	284
Operating Segments | Interventional
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	933	724	903
Total Capital Expenditures	125	119	120
Total Depreciation and Amortization	769	750	881
Segment Reconciling Items
Segment Reporting Information [Line Items]
Acquisitions and other restructurings	185	309	480
Other Operating Income (Expense), Net	(238)	(363)	(579)
Net interest expense	(460)	(521)	(627)
Corporate and All Other
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	(2,783)	(2,224)	(2,115)
Total Capital Expenditures	32	22	30
Total Depreciation and Amortization	$ 12	$ 14	$ 14