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Derivative Instruments and Hedging Activities (Derivatives in Cash Flow Hedging Relationships) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 25, 2020	Jul. 26, 2020	Apr. 26, 2020	Jan. 26, 2020	Oct. 27, 2019	Jul. 28, 2019	Apr. 28, 2019	Jan. 27, 2019	Oct. 25, 2020	Oct. 27, 2019	Oct. 28, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Net sales	$ 4,688	$ 4,395	$ 3,957	$ 4,162	$ 3,754	$ 3,562	$ 3,539	$ 3,753	$ 17,202	$ 14,608	$ 16,705
Cost of products sold									9,510	8,222	9,188
Research, development and engineering									2,234	2,054	2,022
General and administrative									567	461	483
Interest expense									240	237	234
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations									2
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations									1
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations										(4)	(2)
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations										9	12
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations										(3)	(3)
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations										(6)	(7)
Foreign exchange contracts \| Net Sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations									(2)
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations									4
Foreign exchange contracts \| Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations									6
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations									(3)
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations										2	4
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations										15	19
Foreign exchange contracts \| Research, development, and engineering
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations									4
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations									0
Foreign exchange contracts \| General and administrative
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations									1
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations									0
Interest rate contracts \| Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations									(7)
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations									$ 0
Amount of Gain or (Loss) Reclassified from AOCI into Consolidated Statement of Operations										(3)	(3)
Amounts of Gain (Loss) Excluded from Effectiveness Testing Recognized in Consolidated Statement of Operations										$ 0	$ 0