The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amortizable Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 27, 2019	Oct. 28, 2018	Oct. 27, 2019	Oct. 28, 2018	Jan. 27, 2019
Amortizable intangible assets components
Amortization expense	$ 6	$ 7	$ 19	$ 24
Future amortization expense associated with intangible assets
Remainder of fiscal 2020	6		6
Fiscal 2021	16		16
Fiscal 2022	9		9
Fiscal 2023	7		7
Fiscal 2024	5		5
Acquisition-related intangible assets
Amortizable intangible assets components
Gross Carrying Amount	195		195		$ 195
Accumulated Amortization	(191)		(191)		(188)
Net Carrying Amount	4		4		7
Patents and licensed technology
Amortizable intangible assets components
Gross Carrying Amount	508		508		491
Accumulated Amortization	(469)		(469)		(453)
Net Carrying Amount	39		39		38
Total intangible assets
Amortizable intangible assets components
Gross Carrying Amount	703		703		686
Accumulated Amortization	(660)		(660)		(641)
Net Carrying Amount	$ 43		$ 43		$ 45