Benefit Plans (Tables)

9 Months Ended

Oct. 29, 2011

Benefit Plans [Abstract]

Actuarially Determined Components Of Net Periodic Benefit Cost

	13 Weeks Ended						39 Weeks Ended
	October 29, 2011			October 30, 2010			October 29, 2011			October 30, 2010
	(millions)
Pension Plan
Service cost	$	25		$	25		$	76		$	75
Interest cost		40			40			120			119
Expected return on assets		(61	)		(55	)		(185	)		(164	)
Recognition of net actuarial loss		22			15			66			45
Amortization of prior service cost		(1	)		(1	)		(1	)		(1	)
	$	25		$	24		$	76		$	74
Supplementary Retirement Plan
Service cost	$	1		$	1		$	4		$	4
Interest cost		9			9			27			27
Recognition of net actuarial loss		2			1			6			3
Amortization of prior service cost		0			0			(1	)		(1	)
	$	12		$	11		$	36		$	33
Postretirement Obligations
Service cost	$	0		$	0		$	0		$	0
Interest cost		3			4			10			11
Recognition of net actuarial gain		(1	)		(2	)		(4	)		(4	)
Amortization of prior service cost		0			0			0			0
	$	2		$	2		$	6		$	7