Segment Data - Financial Information for Company's Segments (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Revenues	$ 3,059	$ 3,120	$ 2,051	$ 2,051	$ 2,202	$ 2,157	$ 2,072	$ 2,015	$ 10,282	$ 8,446	$ 8,054
Income From Continuing Operations Before Income Taxes									739	1,522	1,165
Total Assets	26,820				12,447				26,820	12,447	12,149
Total Capital Expenditures									596	592	522
Total Depreciation and Amortization									891	562	546
Operating Segments
Segment Reporting Information [Line Items]
Income From Continuing Operations Before Income Taxes									2,368	2,152	2,140
Total Assets	23,987				8,451				23,987	8,451	8,357
Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues									6,460	4,573	4,306
Income From Continuing Operations Before Income Taxes									1,530	1,291	1,233
Total Assets	20,055				4,668				20,055	4,668	4,582
Total Capital Expenditures									414	420	354
Total Depreciation and Amortization									619	293	259
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenues									3,822	3,872	3,748
Income From Continuing Operations Before Income Taxes									839	861	907
Total Assets	3,932				3,783				3,932	3,783	3,776
Total Capital Expenditures									168	155	158
Total Depreciation and Amortization									256	251	267
Corporate and All Other
Segment Reporting Information [Line Items]
Income From Continuing Operations Before Income Taxes									(1,629)	(630)	(976)
Total Assets	$ 2,833				$ 3,997				2,833	3,997	3,792
Total Capital Expenditures									14	16	9
Total Depreciation and Amortization									$ 17	$ 18	$ 19