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Amount of tax expense (benefit) for reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Stockholders' Equity, Comprehensive Income and Share-Based Compensation (Narrative) (Details)	3 Months Ended												12 Months Ended
	Oct. 25, 2020 USD ($) $ / shares 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. 28, 2018 $ / shares	Jul. 29, 2018 $ / shares	Apr. 29, 2018 $ / shares	Jan. 28, 2018 $ / shares	Oct. 25, 2020 USD ($) employee_stock_purchase_plan $ / shares shares	Oct. 27, 2019 USD ($) $ / shares shares	Oct. 28, 2018 USD ($) $ / shares shares	Feb. 28, 2018 USD ($)
Equity [Line Items]
Tax effects on the unrealized gain (loss) on derivative instruments qualifying as cash flow hedges \| $													$ (33,000,000)
Stock Repurchase Program
Authorized amount \| $																$ 6,000,000,000.0
Remaining authorized repurchase amount \| $	$ 1,300,000,000												$ 1,300,000,000
Dividends
Cash dividend declared (usd per share) \| $ / shares	$ 0.22	$ 0.22	$ 0.22	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.10	$ 0.87	$ 0.83	$ 0.70
Payments of dividends \| $													$ 787,000,000	$ 771,000,000	$ 605,000,000
Employee Stock Purchase Plan
Share-based Compensation
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) \| shares													3,000,000	4,000,000	3,000,000
Employee Stock
Share-based Compensation
Performance of total shareholder return													100.00%
Total unrecognized compensation expense \| $	$ 425,000,000												$ 425,000,000
Weighted average period for unrecognized compensation expense to be recognized													2 years 4 months 24 days
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) \| shares													0	0	0
Stock Options \| Employee Stock Incentive Plan
Share-based Compensation
Number of shares available for grant \| shares	56,000,000												56,000,000
Stock Options \| Employee Stock Purchase Plan
Share-based Compensation
Number of shares available for grant \| shares	10,000,000												10,000,000
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) \| shares	1,200,000												1,200,000
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 \| Maximum
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