Benefit Plans (Tables)

9 Months Ended

Oct. 31, 2015

Pension and Other Postretirement Benefit Expense [Abstract]

Schedule of Costs of Retirement Plans

The defined contribution plan expense and actuarially determined components of the net periodic benefit cost (income) associated with the defined benefit plans are as follows:

	13 Weeks Ended						39 Weeks Ended
	October 31, 2015			November 1, 2014			October 31, 2015			November 1, 2014
	(millions)
401(k) Defined Contribution Plan	$	22		$	21		$	69		$	71
Pension Plan
Service cost	$	2		$	2		$	5		$	5
Interest cost	35			38			103			113
Expected return on assets	(59		)	(62		)	(176		)	(185		)
Recognition of net actuarial loss	9			6			28			19
Amortization of prior service credit	—			—			—			—
	$	(13	)	$	(16	)	$	(40	)	$	(48	)
Supplementary Retirement Plan
Service cost	$	—		$	—		$	—		$	—
Interest cost	7			8			23			25
Recognition of net actuarial loss	3			1			8			3
Amortization of prior service cost	—			—			—			—
	$	10		$	9		$	31		$	28
Total Retirement Expense	$	19		$	14		$	60		$	51
Postretirement Obligations
Service cost	$	—		$	—		$	—		$	—
Interest cost	2			3			6			7
Recognition of net actuarial gain	—			(2		)	—			(4		)
Amortization of prior service cost	—			—			—			—
	$	2		$	1		$	6		$	3