Benefit Plans (Tables)

6 Months Ended

Aug. 02, 2014

Pension and Other Postretirement Benefit Expense [Abstract]

Schedule of Net Periodic Benefit Costs

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

	13 Weeks Ended						26 Weeks Ended
	August 2, 2014			August 3, 2013			August 2, 2014			August 3, 2013
	(millions)
Pension Plan
Service cost	$	1		$	28		$	3		$	56
Interest cost	37			35			75			71
Expected return on assets	(62		)	(61		)	(123		)	(121		)
Recognition of net actuarial loss	7			36			13			71
Amortization of prior service credit	—			—			—			—
	$	(17	)	$	38		$	(32	)	$	77
Supplementary Retirement Plan
Service cost	$	—		$	1		$	—		$	3
Interest cost	9			8			17			16
Recognition of net actuarial loss	1			6			2			10
Amortization of prior service cost	—			—			—			—
	$	10		$	15		$	19		$	29
Postretirement Obligations
Service cost	$	—		$	—		$	—		$	—
Interest cost	2			2			4			5
Recognition of net actuarial gain	(1		)	(1		)	(2		)	(2		)
Amortization of prior service cost	—			—			—			—
	$	1		$	1		$	2		$	3