FAIR VALUE MEASUREMENTS AND INVESTMENTS - Carrying Value and Estimated Fair Value of Outstanding Debt (Details) - USD ($) $ in Billions	Apr. 30, 2021	Jan. 29, 2021
Carrying Value | Senior Secured Credit Facilities | Secured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	$ 6.2	$ 6.2
Carrying Value | First Lien Notes | Secured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	18.3	18.3
Carrying Value | Unsecured Notes and Debentures | Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	0.8	1.2
Carrying Value | Senior Notes | Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	1.6	2.7
Carrying Value | EMC Notes | Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	1.0	1.0
Carrying Value | VMware Notes | Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	4.7	4.7
Carrying Value | Margin Loan Facility | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	4.0	4.0
Fair Value | Senior Secured Credit Facilities | Secured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	6.3	6.3
Fair Value | First Lien Notes | Secured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	22.7	22.8
Fair Value | Unsecured Notes and Debentures | Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	1.2	1.6
Fair Value | Senior Notes | Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	1.7	2.8
Fair Value | EMC Notes | Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	1.0	1.0
Fair Value | VMware Notes | Unsecured Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	5.2	5.3
Fair Value | Margin Loan Facility | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding debt	$ 3.9	$ 3.9