SEGMENT INFORMATION - Reconciliation of net revenue by reportable segments to consolidated net revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 29, 2016	Jul. 31, 2015	Jul. 29, 2016	Jul. 31, 2015
Segment Reporting Information [Line Items]
Total net revenue	$ 13,050	$ 12,975	$ 25,263	$ 25,500
Total operating income (loss)	63	(103)	(80)	(414)
Amortization of intangible assets	(491)	(492)	(982)	(986)
Operating Segments
Segment Reporting Information [Line Items]
Total net revenue	12,999	13,004	25,183	25,575
Total operating income (loss)	784	603	1,361	1,061
Operating Segments | Client Solutions
Segment Reporting Information [Line Items]
Total net revenue	9,220	9,235	17,791	18,104
Total operating income (loss)	484	323	869	542
Operating Segments | Enterprise Solutions Group
Segment Reporting Information [Line Items]
Total net revenue	3,779	3,769	7,392	7,471
Total operating income (loss)	300	280	492	519
Corporate
Segment Reporting Information [Line Items]
Total net revenue	116	94	223	188
Total operating income (loss)	(32)	(35)	(74)	(102)
Impact of purchase accounting
Segment Reporting Information [Line Items]
Total net revenue	(65)	(123)	(143)	(263)
Total operating income (loss)	(98)	(154)	(204)	(326)
Other
Segment Reporting Information [Line Items]
Other	(100)	(25)	(181)	(61)
Amortization of intangible assets	$ (491)	$ (492)	$ (982)	$ (986)