Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The number of businesses acquired by the entity during the period.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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BUSINESS COMBINATIONS, GOODWILL AND INTANGIBLE ASSETS - VMware Acquisitions (Details)	3 Months Ended	6 Months Ended
	Jul. 31, 2020 USD ($) acquisition	Jul. 31, 2020 USD ($)	Aug. 02, 2019 USD ($)	Jan. 31, 2020 USD ($)
Business Acquisition [Line Items]
Payments to acquire businesses, net		$ (120,000,000)	$ 3,000,000
Goodwill	$ 40,644,000,000	40,644,000,000		$ 41,691,000,000
VMware
Business Acquisition [Line Items]
Goodwill	20,750,000,000	20,750,000,000		$ 20,532,000,000
VMware \| Datrium
Business Acquisition [Line Items]
Payments to acquire businesses, net	137,000,000
Intangible assets	25,000,000	25,000,000
Goodwill	91,000,000	91,000,000
Goodwill, expected tax deductible amount	$ 0	0
VMware \| Datrium \| Technology \| Minimum
Business Acquisition [Line Items]
Weighted-average useful lives	3 years
VMware \| Datrium \| Technology \| Maximum
Business Acquisition [Line Items]
Weighted-average useful lives	5 years
VMware \| Lastline, Inc.
Business Acquisition [Line Items]
Payments to acquire businesses, net	$ 114,000,000
Intangible assets	29,000,000	29,000,000
Goodwill	86,000,000	86,000,000
Goodwill, expected tax deductible amount	$ 0	0
VMware \| Lastline, Inc. \| Technology \| Minimum
Business Acquisition [Line Items]
Weighted-average useful lives	1 year
VMware \| Lastline, Inc. \| Technology \| Maximum
Business Acquisition [Line Items]
Weighted-average useful lives	4 years
VMware \| Nyansa, Inc
Business Acquisition [Line Items]
Payments to acquire businesses, net		14,000,000
Intangible assets	$ 38,000,000	38,000,000
Goodwill	24,000,000	24,000,000
Goodwill, expected tax deductible amount	0	$ 0
VMware \| Nyansa, Inc \| Technology \| Minimum
Business Acquisition [Line Items]
Weighted-average useful lives		1 year
VMware \| Nyansa, Inc \| Technology \| Maximum
Business Acquisition [Line Items]
Weighted-average useful lives		4 years
VMware \| Fiscal 2021 Acquisitions
Business Acquisition [Line Items]
Payments to acquire businesses, net	40,000,000
Intangible assets	31,000,000	$ 31,000,000
Goodwill	16,000,000	16,000,000
Goodwill, expected tax deductible amount	$ 24,000,000	$ 24,000,000
Number of completed acquisitions \| acquisition	2
VMware \| Fiscal 2021 Acquisitions \| Technology \| Minimum
Business Acquisition [Line Items]
Weighted-average useful lives	1 year
VMware \| Fiscal 2021 Acquisitions \| Technology \| Maximum
Business Acquisition [Line Items]
Weighted-average useful lives	5 years