Stockholders' Equity, Comprehensive Income and Share-Based Compensation (Changes in Components of AOCI) (Details) - USD ($) $ in Millions		3 Months Ended
		Jan. 27, 2019	Jan. 28, 2018	Oct. 29, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		$ 6,845	$ 9,630
Adoption of new accounting standards	[1]			$ 1,553
Other comprehensive income (loss) before reclassifications		(7)	(8)
Amounts reclassified out of AOCI		(5)	(7)
Other comprehensive income (loss), net of tax		(12)	(15)
Ending Balance		8,209	8,817
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		5	6
Amounts reclassified out of AOCI		0	0
Other comprehensive income (loss), net of tax		5	6
Ending Balance		(5)	59
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		(12)	(14)
Amounts reclassified out of AOCI		(5)	(5)
Other comprehensive income (loss), net of tax		(17)	(19)
Ending Balance		(26)	(30)
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)
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		0	0
Amounts reclassified out of AOCI		0	0
Other comprehensive income (loss), net of tax		0	0
Ending Balance		14	14
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		(125)	(64)
Adoption of new accounting standards	[1]			$ (17)
Other comprehensive income (loss), net of tax		(12)	(15)
Ending Balance		$ (154)	$ (79)

[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.