Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Jul. 26, 2015	Oct. 26, 2014
Assets:
Foreign exchange derivative assets	$ 2	$ 52
Total	3,204	3,575
Money market funds [Member]
Assets:
Investment securities	2,152	2,494
U.S. Treasury and agency securities [Member]
Assets:
Investment securities	82	62
Non-US government securities [Member]
Assets:
Investment securities	9	14
Municipal securities [Member]
Assets:
Investment securities	391	393
Commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Investment securities	238	224
Asset-backed and mortgage-backed securities [Member]
Assets:
Investment securities	273	286
Publicly traded equity securities [Member]
Assets:
Investment securities	57	50
Level 1 [Member]
Assets:
Foreign exchange derivative assets	0	0
Total	2,271	2,587
Level 1 [Member] | Money market funds [Member]
Assets:
Investment securities	2,152	2,494
Level 1 [Member] | U.S. Treasury and agency securities [Member]
Assets:
Investment securities	62	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	57	50
Level 2 [Member]
Assets:
Foreign exchange derivative assets	2	52
Total	933	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	20	19
Level 2 [Member] | Non-US government securities [Member]
Assets:
Investment securities	9	14
Level 2 [Member] | Municipal securities [Member]
Assets:
Investment securities	391	393
Level 2 [Member] | Commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Investment securities	238	224
Level 2 [Member] | Asset-backed and mortgage-backed securities [Member]
Assets:
Investment securities	273	286
Level 2 [Member] | Publicly traded equity securities [Member]
Assets:
Investment securities	$ 0	$ 0