Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Oct. 28, 2018	Jul. 29, 2018	Apr. 29, 2018	Jan. 28, 2018	Oct. 29, 2017	Jul. 30, 2017	Apr. 30, 2017	Jan. 29, 2017	Oct. 28, 2018	Oct. 29, 2017	Oct. 30, 2016
Numerator:
Net income	$ 876	$ 1,173	$ 1,129	$ 135	$ 982	$ 925	$ 824	$ 703	$ 3,313	$ 3,434	$ 1,721
Denominator:
Weighted average common shares outstanding (in shares)									1,013	1,073	1,107
Effect of dilutive stock options, restricted stock units and employee stock purchase plan shares (in shares)									13	11	9
Denominator for diluted earnings per share (in shares)									1,026	1,084	1,116
Basic earnings per share (in dollars per share)									$ 3.27	$ 3.20	$ 1.56
Diluted earnings per share (in dollars per share)	$ 0.89	$ 1.17	$ 1.09	$ 0.13	$ 0.91	$ 0.85	$ 0.76	$ 0.65	$ 3.23	$ 3.17	$ 1.54
Potentially dilutive securities (in shares)									0	0	0