Fair Value Measurements (Tables)

9 Months Ended

Oct. 28, 2011

Fair Value Disclosures [Abstract]

Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	October 28, 2011								January 28, 2011
	Level 1(a)		Level 2 (a)		Level 3		Total		Level 1		Level 2		Level 3		Total
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs				Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
							(in millions)
Assets:
Cash equivalents:
Money market funds	$	8,881	$	—	$	—	$	8,881	$	6,261	$	—	$	—	$	6,261
Commercial paper	—		816		—		816		—		2,945		—		2,945
U.S. government and agencies	—		—		—		—		—		1,699		—		1,699
Debt Securities:
U.S. government and agencies	—		—		—		—		—		79		—		79
U.S. corporate	—		1,740		—		1,740		—		464		32		496
International corporate	—		806		—		806		—		457		—		457
Equity and other securities	63		106		—		169		—		109		—		109
Derivative instruments	—		157		—		157		—		27		—		27
Total assets	$	8,944	$	3,625	$	—	$	12,569	$	6,261	$	5,780	$	32	$	12,073
Liabilities:
Derivative instruments	$	—	$	15	$	—	$	15	$	—	$	28	$	—	$	28
Total liabilities	$	—	$	15	$	—	$	15	$	—	$	28	$	—	$	28

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(a) Dell did not transfer any securities between levels during the nine months ended October 28, 2011.