BENEFIT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COSTS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 17, 2019	Aug. 18, 2018	Aug. 17, 2019	Aug. 18, 2018
Pension Benefits
Components of net periodic benefit cost:
Service cost	$ 7	$ 5	$ 17	$ 21
Interest cost	32	31	73	73
Expected return on plan assets	(41)	(40)	(97)	(94)
Amortization of:
Actuarial loss (gain)	15	16	31	41
Net periodic benefit cost	13	12	24	41
Other Benefits
Components of net periodic benefit cost:
Service cost	2	2	4	4
Interest cost	2	2	4	4
Amortization of:
Prior service cost	(2)	(3)	(5)	(6)
Actuarial loss (gain)	$ (2)	(2)	(5)	(5)
Net periodic benefit cost		$ (1)	$ (2)	$ (3)