Stockholders' Equity, Comprehensive Income and Share-Based Compensation (Changes in Components of AOCI) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 26, 2015	Jul. 31, 2016	Jul. 26, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ (92)	$ (76)
Other comprehensive income (loss) before reclassifications			(10)	(47)
Amounts reclassified out of AOCI			15	5
Other comprehensive income (loss), net of tax	$ 8	$ 7	5	(42)
Ending balance	(87)	(118)	(87)	(118)
Unrealized Gain on Investments, Net [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			14	24
Other comprehensive income (loss) before reclassifications			21	(3)
Amounts reclassified out of AOCI			0	0
Other comprehensive income (loss), net of tax			21	(3)
Ending balance	35	21	35	21
Unrealized Gain (Loss) on Derivative Instruments Qualifying as Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(15)	0
Other comprehensive income (loss) before reclassifications			(31)	1
Amounts reclassified out of AOCI			15	(6)
Other comprehensive income (loss), net of tax			(16)	(5)
Ending balance	(31)	(5)	(31)	(5)
Defined and Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(105)	(105)
Other comprehensive income (loss) before reclassifications			0	(45)
Amounts reclassified out of AOCI			0	2
Other comprehensive income (loss), net of tax			0	(43)
Ending balance	(105)	(148)	(105)	(148)
Cumulative Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			14	5
Other comprehensive income (loss) before reclassifications			0	0
Amounts reclassified out of AOCI			0	9
Other comprehensive income (loss), net of tax			0	9
Ending balance	$ 14	$ 14	$ 14	$ 14