BENEFIT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COSTS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 18, 2018	Aug. 12, 2017	Aug. 18, 2018	Aug. 12, 2017
Pension Benefits
Components of net periodic benefit cost:
Service cost	$ 5	$ 17	$ 21	$ 42
Interest cost	31	43	73	98
Expected return on plan assets	(40)	(55)	(94)	(128)
Amortization of:
Actuarial loss (gain)	16	20	41	46
Curtailment				2
Net periodic benefit cost	12	25	41	60
Other Benefits
Components of net periodic benefit cost:
Service cost	2	2	4	5
Interest cost	2	2	4	5
Amortization of:
Prior service cost	(3)	(2)	(6)	(4)
Actuarial loss (gain)	(2)	$ (2)	(5)	(5)
Net periodic benefit cost	$ (1)		$ (3)	$ 1