Segment Data - Financial Information for Company's Segments (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Revenues	$ 3,231	$ 3,198	$ 3,067	$ 2,986	$ 3,059	$ 3,120	$ 2,051	$ 2,051	$ 12,483	$ 10,282	$ 8,446
Income Before Income Taxes									1,074	739	1,522
Acquisition Related Costs And Restructuring Charges									728	426	0
Total Assets	25,586				26,478				25,586	26,478	12,384
Total Capital Expenditures									693	596	592
Total Depreciation and Amortization									1,114	891	562
Operating Segments
Segment Reporting Information [Line Items]
Income Before Income Taxes									2,845	2,368	2,152
Total Assets	23,002				23,987				23,002	23,987	8,451
Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues									8,654	6,460	4,573
Income Before Income Taxes									2,052	1,530	1,291
Total Assets	19,154				20,055				19,154	20,055	4,668
Total Capital Expenditures									482	414	420
Total Depreciation and Amortization									857	619	293
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues									3,829	3,822	3,872
Income Before Income Taxes									793	839	861
Total Assets	3,848				3,932				3,848	3,932	3,783
Total Capital Expenditures									200	168	155
Total Depreciation and Amortization									254	256	251
Segment Reconciling Items
Segment Reporting Information [Line Items]
Acquisition Related Costs And Restructuring Charges									728	426	0
Interest Income (Expense), Net									(367)	(356)	(89)
Corporate and All Other
Segment Reporting Information [Line Items]
Income Before Income Taxes									(676)	(847)	(541)
Total Assets	$ 2,584				$ 2,491				2,584	2,491	3,933
Total Capital Expenditures									12	14	16
Total Depreciation and Amortization									$ 3	$ 17	$ 18