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BUSINESS COMBINATIONS, GOODWILL AND INTANGIBLE ASSETS - Goodwill Impairment Tests (Details) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 18, 2020	Jul. 31, 2020	Aug. 02, 2019	Jul. 31, 2020	Aug. 02, 2019	Jan. 31, 2020	Feb. 01, 2019	Nov. 01, 2019
Business Acquisition [Line Items]
Impairment charges related to intangible assets acquired		$ 0	$ 266,000,000	$ 0	$ 266,000,000
Goodwill		40,644,000,000		40,644,000,000		$ 41,691,000,000
Other Businesses
Business Acquisition [Line Items]
Goodwill		$ 457,000,000		$ 457,000,000		$ 1,833,000,000
Other Businesses \| RSA Security
Business Acquisition [Line Items]
Percentage of fair value over carrying amount		20.00%		20.00%		20.00%		13.00%
Proceeds from divestiture	$ 2,075,000,000.000
Other Businesses \| Virtustream
Business Acquisition [Line Items]
Impairments			$ 619,000,000		$ 619,000,000	$ 619,000,000	$ 190,000,000
Goodwill impairment						207,000,000
Impairment of property plant and equipment						$ 146,000,000