BENEFIT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COSTS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 13, 2016	Aug. 15, 2015	Aug. 13, 2016	Aug. 15, 2015
Pension Benefits
Components of net periodic benefit cost:
Service cost	$ 15	$ 16	$ 36	$ 35
Interest cost	43	39	101	90
Expected return on plan assets	(55)	(53)	(128)	(124)
Amortization of:
Actuarial loss	15	24	34	55
Net periodic benefit cost	18	26	43	56
Other Benefits
Components of net periodic benefit cost:
Service cost	2	3	5	6
Interest cost	3	2	6	6
Amortization of:
Prior service cost	(2)	(3)	(4)	(6)
Actuarial loss	(2)	(1)	(5)	(3)
Net periodic benefit cost	$ 1	$ 1	$ 2	$ 3