Acquisition Fair Value of Assets and Liabilities Assumed (Details) - USD ($) $ in Millions		3 Months Ended
	Dec. 29, 2017	Dec. 31, 2017	Sep. 30, 2017
Business Acquisition [Line Items]
Goodwill		$ 22,699	$ 7,563
CR Bard Inc [Member]
Business Acquisition [Line Items]
Cash and equivalents	$ 1,467
Trade receivables	489
Inventories	1,016
Property, plant and equipment	557
Developed technology	11,738
Customer relationships	1,122
Other assets	490
Total identifiable assets acquired	16,879
Payables, accrued expenses and other liabilities	915
Product liability reserves	1,692
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability	1,560
Deferred tax liabilities	2,749
Total liabilities assumed	6,916
Net identifiable assets acquired	9,963
Goodwill	15,054
Net assets acquired	$ 25,017	$ 25,017