Fair Value Measurements (Details) - USD ($) $ in Millions	Jul. 28, 2019	Oct. 28, 2018
Assets:
Equity investments with readily determinable values	$ 153
U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	345	$ 333
Municipal securities
Assets:
Available-for-sale debt security investments	394	395
Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	680	702
Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	616	591
Publicly traded equity securities
Assets:
Equity investments with readily determinable values	42
Recurring fair value measurements
Assets:
Available-for-sale debt security investments	4,140	3,982
Equity investments with readily determinable values	42	38
Total	4,182	4,020
Recurring fair value measurements | Money market funds
Assets:
Available-for-sale debt security investments	2,010	1,599
Recurring fair value measurements | U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	345	333
Recurring fair value measurements | Non-U.S. government securities
Assets:
Available-for-sale debt security investments	9	10
Recurring fair value measurements | Municipal securities
Assets:
Available-for-sale debt security investments	394	395
Recurring fair value measurements | Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	766	1,054
Recurring fair value measurements | Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	616	591
Recurring fair value measurements | Publicly traded equity securities
Assets:
Equity investments with readily determinable values	42	38
Recurring fair value measurements | Level 1
Assets:
Available-for-sale debt security investments	2,333	1,896
Equity investments with readily determinable values	42	38
Total	2,375	1,934
Recurring fair value measurements | Level 1 | Money market funds
Assets:
Available-for-sale debt security investments	2,010	1,599
Recurring fair value measurements | Level 1 | U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	323	297
Recurring fair value measurements | Level 1 | Non-U.S. government securities
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements | Level 1 | Municipal securities
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements | Level 1 | Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements | Level 1 | Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements | Level 1 | Publicly traded equity securities
Assets:
Equity investments with readily determinable values	42	38
Recurring fair value measurements | Level 2
Assets:
Available-for-sale debt security investments	1,807	2,086
Equity investments with readily determinable values	0	0
Total	1,807	2,086
Recurring fair value measurements | Level 2 | Money market funds
Assets:
Available-for-sale debt security investments	0	0
Recurring fair value measurements | Level 2 | U.S. Treasury and agency securities
Assets:
Available-for-sale debt security investments	22	36
Recurring fair value measurements | Level 2 | Non-U.S. government securities
Assets:
Available-for-sale debt security investments	9	10
Recurring fair value measurements | Level 2 | Municipal securities
Assets:
Available-for-sale debt security investments	394	395
Recurring fair value measurements | Level 2 | Commercial paper, corporate bonds and medium-term notes
Assets:
Available-for-sale debt security investments	766	1,054
Recurring fair value measurements | Level 2 | Asset-backed and mortgage-backed securities
Assets:
Available-for-sale debt security investments	616	591
Recurring fair value measurements | Level 2 | Publicly traded equity securities
Assets:
Equity investments with readily determinable values	$ 0	$ 0