Fair Value Measurements (Assets Measured at Fair Value on a Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Oct. 30, 2016	Oct. 25, 2015
Assets:
Investment securities	$ 3,505	$ 4,823
Level 1
Assets:
Investment securities	2,063	3,389
Level 2
Assets:
Investment securities	1,442	1,434
Money market funds
Assets:
Investment securities	1,889	3,272
Money market funds | Level 1
Assets:
Investment securities	1,889	3,272
Money market funds | Level 2
Assets:
Investment securities	0	0
U.S. Treasury and agency securities
Assets:
Investment securities	205	84
U.S. Treasury and agency securities | Level 1
Assets:
Investment securities	107	72
U.S. Treasury and agency securities | Level 2
Assets:
Investment securities	98	12
Non-U.S. government securities
Assets:
Investment securities	15	69
Non-U.S. government securities | Level 1
Assets:
Investment securities	0	0
Non-U.S. government securities | Level 2
Assets:
Investment securities	15	69
Municipal securities
Assets:
Investment securities	661	459
Municipal securities | Level 1
Assets:
Investment securities	0	0
Municipal securities | Level 2
Assets:
Investment securities	661	459
Commercial paper, corporate bonds and medium-term notes
Assets:
Investment securities	415	632
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	415	632
Asset-backed and mortgage-backed securities
Assets:
Investment securities	253	262
Asset-backed and mortgage-backed securities | Level 1
Assets:
Investment securities	0	0
Asset-backed and mortgage-backed securities | Level 2
Assets:
Investment securities	253	262
Publicly traded equity securities
Assets:
Investment securities	67	45
Publicly traded equity securities | Level 1
Assets:
Investment securities	67	45
Publicly traded equity securities | Level 2
Assets:
Investment securities	$ 0	$ 0