Investments Combined Financial Information for Equity Investments (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Results of Operations:
Revenues	$ 8,122	$ 7,416	$ 6,561
Net Income	857	1,855	1,912
Balance Sheet
Current assets	4,623	4,801	3,676
Non-current assets	10,047	8,906	6,429
Equity Method Investment, Summarized Financial Information, Assets, Total	14,670	13,707	10,105
Current liabilities	2,852	2,018	1,614
Non-current liabilities	5,056	4,531	4,128
Equity Method Investment, Summarized Financial Information, Noncontrolling Interest	1,123	583	0
Shareholders' equity	5,639	6,575	4,363
Equity Method Investment, Summarized Financial Information, Liabilities and Equity, Total	$ 14,670	$ 13,707	$ 10,105