Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Jan. 27, 2013	Oct. 28, 2012
Assets:
Total	$ 2,034	$ 2,046
Money market funds [Member]
Assets:
Investment securities	814	483
U.S. Treasury and agency securities [Member]
Assets:
Investment securities	211	374
Non-US government securities [Member]
Assets:
Investment securities	13	29
Municipal securities [Member]
Assets:
Investment securities	391	431
Commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Investment securities	273	384
Asset-backed and mortgage-backed securities [Member]
Assets:
Investment securities	286	298
Publicly traded equity securities [Member]
Assets:
Investment securities	46	47
Level 1 [Member]
Assets:
Total	968	658
Level 1 [Member] | Money market funds [Member]
Assets:
Investment securities	814	483
Level 1 [Member] | U.S. Treasury and agency securities [Member]
Assets:
Investment securities	108	128
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	47
Level 2 [Member]
Assets:
Total	1,066	1,388
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	103	246
Level 2 [Member] | Non-US government securities [Member]
Assets:
Investment securities	13	29
Level 2 [Member] | Municipal securities [Member]
Assets:
Investment securities	391	431
Level 2 [Member] | Commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Investment securities	273	384
Level 2 [Member] | Asset-backed and mortgage-backed securities [Member]
Assets:
Investment securities	286	298
Level 2 [Member] | Publicly traded equity securities [Member]
Assets:
Investment securities	$ 0	$ 0