BENEFIT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COSTS (Details) - USD ($) $ in Millions	4 Months Ended
	May 21, 2016	May 23, 2015
Pension Benefits
Components of net periodic benefit cost:
Service cost	$ 21	$ 19
Interest cost	58	51
Expected return on plan assets	(73)	(71)
Amortization of:
Actuarial loss	19	31
Net periodic benefit expense	25	30
Other Benefits
Components of net periodic benefit cost:
Service cost	3	4
Interest cost	3	3
Amortization of:
Prior service cost	(2)	(4)
Actuarial loss	(3)	(2)
Net periodic benefit expense	$ 1	$ 1