Stockholders' Equity, Comprehensive Income and Share-Based Compensation (Changes in Components of AOCI) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Apr. 28, 2019	Apr. 29, 2018	Apr. 28, 2019	Apr. 29, 2018	Oct. 29, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		$ 8,209	$ 8,817	$ 6,845	$ 9,630
Adoption of new accounting standards	[1]					$ 1,553
Other comprehensive income (loss) before reclassifications				8	(16)
Amounts reclassified out of AOCI				(4)	2
Other comprehensive income (loss), net of tax		16	1	4	(14)
Ending Balance		8,201	7,324	8,201	7,324
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)
Other comprehensive income (loss) before reclassifications				13	(3)
Amounts reclassified out of AOCI				0	2
Other comprehensive income (loss), net of tax				13	(1)
Ending Balance		3	52	3	52
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
Other comprehensive income (loss) before reclassifications				(4)	(13)
Amounts reclassified out of AOCI				(4)	2
Other comprehensive income (loss), net of tax				(8)	(11)
Ending Balance		(17)	(22)	(17)	(22)
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
Other comprehensive income (loss) before reclassifications				0	0
Amounts reclassified out of AOCI				0	(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
Other comprehensive income (loss) before reclassifications				(1)	0
Amounts reclassified out of AOCI				0	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		(154)	(79)	(125)	(64)
Adoption of new accounting standards	[1]					$ (17)
Other comprehensive income (loss), net of tax		16	1	4	(14)
Ending Balance		$ (138)	$ (78)	$ (138)	$ (78)

[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.