Segment Data - Financial Information for Company's Segments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 2,051	$ 2,015
Income Before Income Taxes	285	359
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income Before Income Taxes	517	528
Corporate and All Other [Member]
Segment Reporting Information [Line Items]
Income Before Income Taxes	(232)	(170)
Medical [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	1,072	1,064
Income Before Income Taxes	304	294
Life Sciences [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	979	951
Income Before Income Taxes	$ 214	$ 234