Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Apr. 28, 2013	Oct. 28, 2012
Assets:
Total	$ 2,187	$ 2,046
Money market funds [Member]
Assets:
Investment securities	955	483
U.S. Treasury and agency securities [Member]
Assets:
Investment securities	218	374
Non-US government securities [Member]
Assets:
Investment securities	14	29
Municipal securities [Member]
Assets:
Investment securities	387	431
Commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Investment securities	265	384
Asset-backed and mortgage-backed securities [Member]
Assets:
Investment securities	291	298
Publicly traded equity securities [Member]
Assets:
Investment securities	57	47
Level 1 [Member]
Assets:
Total	1,110	658
Level 1 [Member] | Money market funds [Member]
Assets:
Investment securities	955	483
Level 1 [Member] | U.S. Treasury and agency securities [Member]
Assets:
Investment securities	98	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	57	47
Level 2 [Member]
Assets:
Total	1,077	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	120	246
Level 2 [Member] | Non-US government securities [Member]
Assets:
Investment securities	14	29
Level 2 [Member] | Municipal securities [Member]
Assets:
Investment securities	387	431
Level 2 [Member] | Commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Investment securities	265	384
Level 2 [Member] | Asset-backed and mortgage-backed securities [Member]
Assets:
Investment securities	291	298
Level 2 [Member] | Publicly traded equity securities [Member]
Assets:
Investment securities	$ 0	$ 0