Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 26, 2015	Jul. 31, 2016	Jul. 26, 2015
Numerator:
Net income	$ 505	$ 329	$ 1,111	$ 1,041
Denominator:
Weighted average common shares outstanding (in shares)	1,083	1,221	1,115	1,225
Effect of dilutive stock options, restricted stock units and employee stock purchase plan shares (in shares)	10	10	8	13
Denominator for diluted earnings per share (in shares)	1,093	1,231	1,123	1,238
Basic earnings per share (in dollars per share)	$ 0.47	$ 0.27	$ 1.00	$ 0.85
Diluted earnings per share (in dollars per share)	$ 0.46	$ 0.27	$ 0.99	$ 0.84
Potentially dilutive securities (in shares)	0	0	0	1