ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - ITEMS RECLASSIFIED OUT OF AOCI (Details) - USD ($) $ in Millions	3 Months Ended						4 Months Ended		12 Months Ended
	Jan. 28, 2017	Nov. 05, 2016	Aug. 13, 2016	Jan. 30, 2016	Nov. 07, 2015	Aug. 15, 2015	May 21, 2016	May 23, 2015	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Reclassification out of AOCI and the related tax effects
Amortization of gains and losses on cash flow hedging activities	$ 126	$ 124	$ 116	$ 113	$ 107	$ 114	$ 155	$ 148	$ 522	$ 482	$ 488
Realized gains on available for sale securities	4,483	4,443	4,473	4,355	4,169	4,068	5,779	5,354	19,178	17,946	17,161
Tax expense	230	206	171	250	238	227	350	330	957	1,045	902
Net of tax	$ (506)	$ (391)	$ (383)	$ (559)	$ (428)	$ (433)	$ (696)	$ (619)	(1,975)	(2,039)	(1,728)
Total reclassifications, net of tax									21	54	23
Cash Flow Hedging Activities
Reclassification out of AOCI and the related tax effects
Total reclassifications, net of tax									2	1
Available for sale Securities
Reclassification out of AOCI and the related tax effects
Tax expense									13
Total reclassifications, net of tax									(14)
Pension and Postretirement Defined Benefit Plans
Reclassification out of AOCI and the related tax effects
Amortization of amounts included in net periodic pension expense									53	85	35
Tax expense									(20)	(32)	(13)
Total reclassifications, net of tax									33	53	22
Reclassification out of AOCI | Cash Flow Hedging Activities
Reclassification out of AOCI and the related tax effects
Amortization of gains and losses on cash flow hedging activities									2	1	1
Net of tax									2	$ 1	$ 1
Reclassification out of AOCI | Available for sale Securities
Reclassification out of AOCI and the related tax effects
Realized gains on available for sale securities									(27)
Tax expense									13
Net of tax									$ (14)