Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013	Nov. 01, 2015
Commitments
Rent expense	$ 1,000	$ 1,000	$ 1,000
Property under capital lease	207	229
Accumulated depreciation on property under capital lease	187	$ 207
Operating lease commitments, sublease rental income
2016	624
2017	517
2018	379
2019	310
2020	237
Thereafter	801
Less: Sublease rental income	(77)
Total	2,791			$ 367
Unconditional purchase obligations details
Unconditional purchase obligations	2,700
Unconditional purchase obligations, 2016	1,126
Unconditional purchase obligations, 2017	473
Unconditional purchase obligations, 2018	471
Unconditional purchase obligations, 2019	342
Unconditional purchase obligations, 2020	109
Unconditional purchase obligations, thereafter	133
Unconditional purchase obligations, total	$ 2,654			$ 915