Stockholders' Equity, Comprehensive Income and Share-Based Compensation - Changes in Components of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2021	Jan. 26, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 10,578	$ 8,214
Other comprehensive income (loss) before reclassifications	0	(6)
Amounts reclassified out of AOCI	2	(2)
Other comprehensive income (loss), net of tax	2	(8)
Ending Balance	11,473	8,660
Unrealized Gain (Loss) on Investments, Net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	20	11
Other comprehensive income (loss) before reclassifications	(1)	3
Amounts reclassified out of AOCI	(1)	(1)
Other comprehensive income (loss), net of tax	(2)	2
Ending Balance	18	13
Unrealized Gain (Loss) on Derivative Instruments Qualifying as Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(133)	(16)
Other comprehensive income (loss) before reclassifications	1	(9)
Amounts reclassified out of AOCI	3	(1)
Other comprehensive income (loss), net of tax	4	(10)
Ending Balance	(129)	(26)
Defined and Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(199)	(188)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified out of AOCI	0	0
Other comprehensive income (loss), net of tax	0	0
Ending Balance	(199)	(188)
Cumulative Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	13	13
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified out of AOCI	0	0
Other comprehensive income (loss), net of tax	0	0
Ending Balance	13	13
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(299)	(180)
Other comprehensive income (loss), net of tax	2	(8)
Ending Balance	$ (297)	$ (188)