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Stockholders' Equity, Comprehensive Income and Share-Based Compensation (Narrative) (Details)	3 Months Ended												12 Months Ended
	Oct. 31, 2021 USD ($) $ / shares shares	Aug. 01, 2021 $ / shares	May 02, 2021 $ / shares	Jan. 31, 2021 $ / shares	Oct. 25, 2020 $ / shares	Jul. 26, 2020 $ / shares	Apr. 26, 2020 $ / shares	Jan. 26, 2020 $ / shares	Oct. 27, 2019 $ / shares	Jul. 28, 2019 $ / shares	Apr. 28, 2019 $ / shares	Jan. 27, 2019 $ / shares	Oct. 31, 2021 USD ($) employee_stock_purchase_plan $ / shares shares	Oct. 25, 2020 USD ($) $ / shares shares	Oct. 27, 2019 USD ($) $ / shares shares	Sep. 01, 2021 shares	Mar. 31, 2021 USD ($)	Mar. 11, 2021 shares	Feb. 28, 2018 USD ($)
Equity [Line Items]
Tax effects on the unrealized loss on derivative instruments qualifying as cash flow hedges \| $														$ 33,000,000
Stock Repurchase Program
Authorized amount \| $																	$ 7,500,000,000		$ 6,000,000,000
Remaining authorized repurchase amount \| $	$ 5,000,000,000												$ 5,000,000,000
Dividends
Cash dividend declared (usd per share) \| $ / shares	$ 0.24	$ 0.24	$ 0.24	$ 0.22	$ 0.22	$ 0.22	$ 0.22	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.20	$ 0.94	$ 0.87	$ 0.83
Payments of dividends \| $													$ 838,000,000	$ 787,000,000	$ 771,000,000
Employee Stock Incentive Plan
Share-based Compensation
Increase in capital shares reserved for future issuance (in shares)																		10,000,000
Employee Stock Purchase Plan
Share-based Compensation
Increase in capital shares reserved for future issuance (in shares)																11,300,000
Number of employee stock purchase plans \| employee_stock_purchase_plan													2
Employee Stock Purchase Plans
Purchase period													6 months
Number of shares issued under the ESPP (in shares)													3,000,000	3,000,000	4,000,000
Employee Stock
Share-based Compensation
Performance of total shareholder return													100.00%
Total unrecognized compensation expense \| $	$ 512,000,000												$ 512,000,000
Weighted average period for unrecognized compensation expense to be recognized													2 years 6 months
Employee Stock \| Employee Stock Purchase Plan
Employee Stock Purchase Plans
Purchase price of common stock, percent													85.00%
Stock Options
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Stock options scheduled to expire													7 years
Options granted (in shares)													0	0	0
Stock Options \| Employee Stock Incentive Plan
Share-based Compensation
Number of shares available for grant	35,000,000												35,000,000
Stock Options \| Employee Stock Purchase Plan
Share-based Compensation
Number of shares available for grant	16,000,000												16,000,000
Stock Options \| Minimum
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Stock options scheduled to be vested													3 years
Stock Options \| Maximum
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Stock options scheduled to be vested													4 years
Performance Shares/Performance Units
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Award measurement period													3 years
Weight of metric (as a percent)													50.00%
Additional performance-based awards to be earned upon certain levels of achievement (in shares)	1,200,000												1,200,000
Performance Shares/Performance Units \| Executive Officer
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Award measurement period													5 years
Performance Shares/Performance Units \| Minimum
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Award vesting rights as percentage of target amount													0.00%
Performance Shares/Performance Units \| Minimum \| Executive Officer
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Award vesting rights as percentage of target amount													0.00%
Performance Shares/Performance Units \| Maximum
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Award vesting rights as percentage of target amount													200.00%
Performance Shares/Performance Units \| Maximum \| Executive Officer
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Award vesting rights as percentage of target amount													200.00%
Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units \| Minimum
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Stock options scheduled to be vested													3 years
Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units \| Maximum
Stock Options, Restricted Stock Units, Restricted Stock, Performance Shares and Performance Units
Stock options scheduled to be vested													4 years
United States \| Employee Stock Purchase Plan
Share-based Compensation
Number of employee stock purchase plans \| employee_stock_purchase_plan													1
Non-US \| Employee Stock Purchase Plan
Share-based Compensation
Number of employee stock purchase plans \| employee_stock_purchase_plan													1