Fair Value Measurements (Details) - Recurring fair value measurements - USD ($) $ in Millions	Jan. 28, 2018	Oct. 29, 2017
Assets:
Investment securities	$ 7,113	$ 6,999
Money market funds
Assets:
Investment securities	3,766	2,658
U.S. Treasury and agency securities
Assets:
Investment securities	254	681
Non-U.S. government securities
Assets:
Investment securities	50	216
Municipal securities
Assets:
Investment securities	1,286	1,348
Commercial paper, corporate bonds and medium-term notes
Assets:
Investment securities	1,249	1,619
Asset-backed and mortgage-backed securities
Assets:
Investment securities	394	378
Publicly traded equity securities
Assets:
Investment securities	114	99
Level 1
Assets:
Investment securities	4,107	2,949
Level 1 | Money market funds
Assets:
Investment securities	3,766	2,658
Level 1 | U.S. Treasury and agency securities
Assets:
Investment securities	227	192
Level 1 | Non-U.S. government securities
Assets:
Investment securities	0	0
Level 1 | Municipal securities
Assets:
Investment securities	0	0
Level 1 | Commercial paper, corporate bonds and medium-term notes
Assets:
Investment securities	0	0
Level 1 | Asset-backed and mortgage-backed securities
Assets:
Investment securities	0	0
Level 1 | Publicly traded equity securities
Assets:
Investment securities	114	99
Level 2
Assets:
Investment securities	3,006	4,050
Level 2 | Money market funds
Assets:
Investment securities	0	0
Level 2 | U.S. Treasury and agency securities
Assets:
Investment securities	27	489
Level 2 | Non-U.S. government securities
Assets:
Investment securities	50	216
Level 2 | Municipal securities
Assets:
Investment securities	1,286	1,348
Level 2 | Commercial paper, corporate bonds and medium-term notes
Assets:
Investment securities	1,249	1,619
Level 2 | Asset-backed and mortgage-backed securities
Assets:
Investment securities	394	378
Level 2 | Publicly traded equity securities
Assets:
Investment securities	$ 0	$ 0