Acquisitions - Fair Value of Assets and Liabilities Assumed (Detail) - USD ($) $ in Millions	Mar. 17, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Goodwill		$ 7,419	$ 7,537	$ 1,090
Care Fusion Corporation
Business Acquisition [Line Items]
Cash and equivalents	$ 1,903
Trade receivables, net	526
Inventories	818
Net investment in sales-type leases	1,206
Property, plant and equipment	497
Customer relationships	3,360
Developed technology	2,510
Trademarks	380
Other intangible assets	185
Other assets	278
Total identifiable assets acquired	11,663
Long-term debt	(2,181)
Deferred tax liabilities	(1,888)
Other liabilities	(1,306)
Total liabilities assumed	(5,374)
Net identifiable assets acquired	6,289
Goodwill	6,249
Net assets acquired	$ 12,538