Fair Value Measurements (Assets Measured at Fair Value on a Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Oct. 29, 2017	Oct. 30, 2016
Assets:
Investment securities	$ 6,999	$ 3,505
Level 1
Assets:
Investment securities	2,949	2,063
Level 2
Assets:
Investment securities	4,050	1,442
Money market funds
Assets:
Investment securities	2,658	1,889
Money market funds | Level 1
Assets:
Investment securities	2,658	1,889
Money market funds | Level 2
Assets:
Investment securities	0	0
U.S. Treasury and agency securities
Assets:
Investment securities	681	205
U.S. Treasury and agency securities | Level 1
Assets:
Investment securities	192	107
U.S. Treasury and agency securities | Level 2
Assets:
Investment securities	489	98
Non-U.S. government securities
Assets:
Investment securities	216	15
Non-U.S. government securities | Level 1
Assets:
Investment securities	0	0
Non-U.S. government securities | Level 2
Assets:
Investment securities	216	15
Municipal securities
Assets:
Investment securities	1,348	661
Municipal securities | Level 1
Assets:
Investment securities	0	0
Municipal securities | Level 2
Assets:
Investment securities	1,348	661
Commercial paper, corporate bonds and medium-term notes
Assets:
Investment securities	1,619	415
Commercial paper, corporate bonds and medium-term notes | Level 1
Assets:
Investment securities	0	0
Commercial paper, corporate bonds and medium-term notes | Level 2
Assets:
Investment securities	1,619	415
Asset-backed and mortgage-backed securities
Assets:
Investment securities	378	253
Asset-backed and mortgage-backed securities | Level 1
Assets:
Investment securities	0	0
Asset-backed and mortgage-backed securities | Level 2
Assets:
Investment securities	378	253
Publicly traded equity securities
Assets:
Investment securities	99	67
Publicly traded equity securities | Level 1
Assets:
Investment securities	99	67
Publicly traded equity securities | Level 2
Assets:
Investment securities	$ 0	$ 0