COMPANY-SPONSORED BENEFIT PLANS - AMOUNTS RECOGNIZED IN AOCI AND OTHER CHANGES IN OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Amounts recognized in AOCI (pre-tax):
Net actuarial loss (gain)	$ 1,188	$ 1,092
Prior service cost (credit)	(58)	(65)
Total	1,130	1,027
Amounts in AOCI expected to be recognized as components of net periodic pension or postretirement benefit costs in the next fiscal year (pre-tax):
Net actuarial loss (gain)	76
Prior service cost (credit)	(8)
Total	68
Other changes recognized in other comprehensive income (pre-tax):
Incurred net actuarial loss (gain)	156	(122)	$ 604
Amortization of prior service credit	8	11	7
Amortization of net actuarial gain (loss)	(61)	(95)	(42)
Other		(2)	(47)
Total recognized in other comprehensive income (loss)	103	(208)	522
Total recognized in net periodic benefit cost and other comprehensive income	198	(104)	586
Pension Benefits
Amounts recognized in AOCI (pre-tax):
Net actuarial loss (gain)	1,308	1,213
Prior service cost (credit)		1
Total	1,308	1,214
Amounts in AOCI expected to be recognized as components of net periodic pension or postretirement benefit costs in the next fiscal year (pre-tax):
Net actuarial loss (gain)	85
Total	85
Other changes recognized in other comprehensive income (pre-tax):
Incurred net actuarial loss (gain)	165	(83)	590
Amortization of net actuarial gain (loss)	(71)	(102)	(50)
Total recognized in other comprehensive income (loss)	94	(185)	540
Total recognized in net periodic benefit cost and other comprehensive income	188	(82)	595
Other Benefits
Amounts recognized in AOCI (pre-tax):
Net actuarial loss (gain)	(120)	(121)
Prior service cost (credit)	(58)	(66)
Total	(178)	(187)
Amounts in AOCI expected to be recognized as components of net periodic pension or postretirement benefit costs in the next fiscal year (pre-tax):
Net actuarial loss (gain)	(9)
Prior service cost (credit)	(8)
Total	(17)
Other changes recognized in other comprehensive income (pre-tax):
Incurred net actuarial loss (gain)	(9)	(39)	14
Amortization of prior service credit	8	11	7
Amortization of net actuarial gain (loss)	10	7	8
Other		(2)	(47)
Total recognized in other comprehensive income (loss)	9	(23)	(18)
Total recognized in net periodic benefit cost and other comprehensive income	$ 10	$ (22)	$ (9)