BENEFIT PLANS (Details) (USD $) In Millions, unless otherwise specified	4 Months Ended
	May 19, 2012	May 21, 2011
Amortization of:
Contribution to employee 401(k) retirement savings accounts	$ 44	$ 40
Pension Benefits
Components of net periodic benefit cost:
Service cost	16	14
Interest cost	49	52
Expected return on plan assets	(65)	(63)
Amortization of:
Actuarial loss	31	20
Net periodic benefit cost	31	23
Other Benefits
Components of net periodic benefit cost:
Service cost	5	4
Interest cost	5	5
Amortization of:
Prior service cost	(1)	(1)
Net periodic benefit cost	$ 9	$ 8