Stockholders' Equity, Comprehensive Income and Share-Based Compensation (Changes in Components of AOCI) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 28, 2019	Jul. 29, 2018	Jul. 28, 2019	Jul. 29, 2018	Oct. 29, 2018	[1]	Apr. 30, 2018	[2]	Oct. 30, 2017	[2]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 8,201	$ 7,324	$ 6,845	$ 9,630
Adoption of new accounting standards					$ 1,553		$ 0		$ 0
Other comprehensive income (loss) before reclassifications			5	(11)
Amounts reclassified out of AOCI				(5)
Other comprehensive income (loss), net of tax	1	(2)	5	(16)
Ending Balance	8,116	6,950	8,116	6,950
Unrealized Gain on Investments, Net
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			7	53
Adoption of new accounting standards					(17)				5
Other comprehensive income (loss) before reclassifications			19	(7)
Amounts reclassified out of AOCI				(12)
Other comprehensive income (loss), net of tax			19	(19)
Ending Balance	9	39	9	39
Unrealized Gain (Loss) on Derivative Instruments Qualifying as Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			(9)	(11)
Adoption of new accounting standards					0				(2)
Other comprehensive income (loss) before reclassifications			(13)	(4)
Amounts reclassified out of AOCI				9
Other comprehensive income (loss), net of tax			(13)	5
Ending Balance	(22)	(8)	(22)	(8)
Defined and Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			(137)	(120)
Adoption of new accounting standards					0				0
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified out of AOCI				(2)
Other comprehensive income (loss), net of tax			0	(2)
Ending Balance	(137)	(122)	(137)	(122)
Cumulative Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			14	14
Adoption of new accounting standards					0				0
Other comprehensive income (loss) before reclassifications			(1)	0
Amounts reclassified out of AOCI				0
Other comprehensive income (loss), net of tax			(1)	0
Ending Balance	13	14	13	14
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(138)	(78)	(125)	(64)
Adoption of new accounting standards					$ (17)		$ 3		$ 3
Other comprehensive income (loss), net of tax	1	(2)	5	(16)
Ending Balance	$ (137)	$ (77)	$ (137)	$ (77)

[1] Represents the reclassification adjustment related to the adoption of Accounting Standard Update (ASU) 2016-01 Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities and ASU 2016-16 Income Tax (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. See Note 1.

[2] Represents the reclassification adjustment related to the early adoption of Accounting Standards Update (ASU) 2018-02 Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.