Stockholders' Equity (Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jul. 31, 2020	Aug. 02, 2019		Jul. 31, 2020	Aug. 02, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance				$ 7,009
Unrealized gains (losses), net of tax provision (benefit)				(5)	$ 6
Amounts reclassified from accumulated other comprehensive income (loss) to the condensed consolidated statements of income (loss), net of tax (provision) benefit of $—, $— and $—					(1)
Total other comprehensive income (loss)	$ 9	$ 1	[1]	(5)	5	[1]
Balance	7,907			7,907
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance				(4)	(2)
Total other comprehensive income (loss)	9	1	[1]	(5)	5	[1]
Balance	(9)	3		(9)	3
Tax provision (benefit) on OCI before reclass				(1)	0
Tax (provision) benefit on amounts reclassified from AOCI					0
Unrealized Gain (Loss) on Forward Contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance				0	2
Unrealized gains (losses), net of tax provision (benefit)				(5)	6
Amounts reclassified from accumulated other comprehensive income (loss) to the condensed consolidated statements of income (loss), net of tax (provision) benefit of $—, $— and $—					(1)
Total other comprehensive income (loss)				(5)	5
Balance	(5)	7		(5)	7
Tax provision (benefit) on OCI before reclass				(1)	0
Tax (provision) benefit on amounts reclassified from AOCI					0
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance				(4)	(4)
Unrealized gains (losses), net of tax provision (benefit)				0	0
Amounts reclassified from accumulated other comprehensive income (loss) to the condensed consolidated statements of income (loss), net of tax (provision) benefit of $—, $— and $—					0
Total other comprehensive income (loss)				0	0
Balance	$ (4)	$ (4)		(4)	(4)
Tax provision (benefit) on OCI before reclass				$ 0	0
Tax (provision) benefit on amounts reclassified from AOCI					$ 0

[1] Adjusted to reflect the recast of prior period information due to the Pivotal Software, Inc. (“Pivotal”) acquisition in fiscal 2020, which was accounted for as a transaction between entities under common control (refer to Note A).