Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Apr. 26, 2015	Oct. 26, 2014
Assets:
Foreign exchange derivative assets	$ 144	$ 52
Total	3,748	3,575
Money market funds [Member]
Assets:
Investment securities	2,571	2,494
U.S. Treasury and agency securities [Member]
Assets:
Investment securities	89	62
Non-US government securities [Member]
Assets:
Investment securities	12	14
Municipal securities [Member]
Assets:
Investment securities	376	393
Commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Investment securities	231	224
Asset-backed and mortgage-backed securities [Member]
Assets:
Investment securities	279	286
Publicly traded equity securities [Member]
Assets:
Investment securities	46	50
Level 1 [Member]
Assets:
Foreign exchange derivative assets	0	0
Total	2,681	2,587
Level 1 [Member] | Money market funds [Member]
Assets:
Investment securities	2,571	2,494
Level 1 [Member] | U.S. Treasury and agency securities [Member]
Assets:
Investment securities	64	43
Level 1 [Member] | Non-US government securities [Member]
Assets:
Investment securities	0	0
Level 1 [Member] | Municipal securities [Member]
Assets:
Investment securities	0	0
Level 1 [Member] | Commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Investment securities	0	0
Level 1 [Member] | Asset-backed and mortgage-backed securities [Member]
Assets:
Investment securities	0	0
Level 1 [Member] | Publicly traded equity securities [Member]
Assets:
Investment securities	46	50
Level 2 [Member]
Assets:
Foreign exchange derivative assets	144	52
Total	1,067	988
Level 2 [Member] | Money market funds [Member]
Assets:
Investment securities	0	0
Level 2 [Member] | U.S. Treasury and agency securities [Member]
Assets:
Investment securities	25	19
Level 2 [Member] | Non-US government securities [Member]
Assets:
Investment securities	12	14
Level 2 [Member] | Municipal securities [Member]
Assets:
Investment securities	376	393
Level 2 [Member] | Commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Investment securities	231	224
Level 2 [Member] | Asset-backed and mortgage-backed securities [Member]
Assets:
Investment securities	279	286
Level 2 [Member] | Publicly traded equity securities [Member]
Assets:
Investment securities	$ 0	$ 0