Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Oct. 30, 2016	Jul. 31, 2016	May 01, 2016	Jan. 31, 2016	Oct. 25, 2015	Jul. 26, 2015	Apr. 26, 2015	Jan. 25, 2015	Oct. 30, 2016	Oct. 25, 2015	Oct. 26, 2014
Numerator:
Net income	$ 610	$ 505	$ 320	$ 286	$ 336	$ 329	$ 364	$ 348	$ 1,721	$ 1,377	$ 1,072
Denominator:
Weighted average common shares outstanding									1,107	1,214	1,215
Effect of dilutive stock options, restricted stock units and employee stock purchase plan shares									9	12	16
Denominator for diluted earnings per share									1,116	1,226	1,231
Basic earnings per share (in dollars per share)									$ 1.56	$ 1.13	$ 0.88
Diluted earnings per share (in dollars per share)	$ 0.56	$ 0.46	$ 0.29	$ 0.25	$ 0.28	$ 0.27	$ 0.29	$ 0.28	$ 1.54	$ 1.12	$ 0.87
Potentially dilutive securities									0	0	1