Shareholders' Equity - Stock Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Jan. 23, 2021	Oct. 24, 2020	Jul. 25, 2020	Apr. 25, 2020	Jan. 25, 2020	Oct. 26, 2019
Stockholders' Equity Note [Abstract]
Shares (in shares)	19	20	0	25	18	16
Weighted-Average Price per Share (in dollars per share)	$ 42.82	$ 40.44	$ 0	$ 39.71	$ 46.71	$ 48.91
Amount	$ 801	$ 800	$ 0	$ 981	$ 870	$ 768

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Balance Type:	debit
Period Type:	duration