Benefit Plans (Tables)

3 Months Ended

Apr. 28, 2012

Pension and Other Postretirement Benefit Expense [Abstract]

Schedule of Net Periodic Benefit Costs

The actuarially determined components of the net periodic benefit cost are as follows:

	13 Weeks Ended
	April 28, 2012			April 30, 2011
	(millions)
Pension Plan
Service cost	$	28		$	26
Interest cost	39			40
Expected return on assets	(63		)	(62		)
Recognition of net actuarial loss	35			21
Amortization of prior service credit	—			—
	$	39		$	25
Supplementary Retirement Plan
Service cost	$	2		$	1
Interest cost	8			9
Recognition of net actuarial loss	4			2
Amortization of prior service credit	—			—
	$	14		$	12
Postretirement Obligations
Service cost	$	—		$	—
Interest cost	3			4
Recognition of net actuarial gain	(1		)	(1		)
Amortization of prior service cost	—			—
	$	2		$	3