Fair Value Measurements (Assets Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Oct. 28, 2018	Oct. 29, 2017
Assets:
Investment securities	$ 2,158	$ 3,409
Fair Value, Measurements, Recurring
Assets:
Investment securities	4,020	6,999
Fair Value, Measurements, Recurring | Level 1
Assets:
Investment securities	1,934	2,949
Fair Value, Measurements, Recurring | Level 2
Assets:
Investment securities	2,086	4,050
Fair Value, Measurements, Recurring | Money market funds
Assets:
Investment securities	1,599	2,658
Fair Value, Measurements, Recurring | Money market funds | Level 1
Assets:
Investment securities	1,599	2,658
Fair Value, Measurements, Recurring | Money market funds | Level 2
Assets:
Investment securities	0	0
Fair Value, Measurements, Recurring | U.S. Treasury and agency securities
Assets:
Investment securities	333	681
Fair Value, Measurements, Recurring | U.S. Treasury and agency securities | Level 1
Assets:
Investment securities	297	192
Fair Value, Measurements, Recurring | U.S. Treasury and agency securities | Level 2
Assets:
Investment securities	36	489
Fair Value, Measurements, Recurring | Non-U.S. government securities
Assets:
Investment securities	10	216
Fair Value, Measurements, Recurring | Non-U.S. government securities | Level 1
Assets:
Investment securities	0	0
Fair Value, Measurements, Recurring | Non-U.S. government securities | Level 2
Assets:
Investment securities	10	216
Fair Value, Measurements, Recurring | Municipal securities
Assets:
Investment securities	395	1,348
Fair Value, Measurements, Recurring | Municipal securities | Level 1
Assets:
Investment securities	0	0
Fair Value, Measurements, Recurring | Municipal securities | Level 2
Assets:
Investment securities	395	1,348
Fair Value, Measurements, Recurring | Commercial paper, corporate bonds and medium-term notes
Assets:
Investment securities	1,054	1,619
Fair Value, Measurements, Recurring | Commercial paper, corporate bonds and medium-term notes | Level 1
Assets:
Investment securities	0	0
Fair Value, Measurements, Recurring | Commercial paper, corporate bonds and medium-term notes | Level 2
Assets:
Investment securities	1,054	1,619
Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities
Assets:
Investment securities	591	378
Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities | Level 1
Assets:
Investment securities	0	0
Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities | Level 2
Assets:
Investment securities	591	378
Fair Value, Measurements, Recurring | Publicly traded equity securities
Assets:
Investment securities	38	99
Fair Value, Measurements, Recurring | Publicly traded equity securities | Level 1
Assets:
Investment securities	38	99
Fair Value, Measurements, Recurring | Publicly traded equity securities | Level 2
Assets:
Investment securities	$ 0	$ 0