Pension and Postretirement Plans (Tables)

6 Months Ended

Aug. 01, 2015

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Pension Benefit Cost and Postretirement Benefit Income

The following are the components of net periodic pension benefit cost and net periodic postretirement benefit income, which is recognized as part of SG&A expense:

	Pension Benefits								Postretirement Benefits
	Thirteen weeks				Twenty-six weeks				Thirteen weeks				Twenty-six weeks
	ended				ended				ended				ended
	August 1,		August 2,		August 1,		August 2,		August 1,		August 2,		August 1,		August 2,
($ in millions)	2015		2014		2015		2014		2015		2014		2015		2014
Service cost	$	4	$	4	$	8	$	8	$	—	$	—	$	—	$	—
Interest cost		6		7		12		14		1		—		1		—
Expected return on plan assets		(10)		(9)		(19)		(19)		—		—		—		—
Amortization of net loss (gain)		4		3		7		7		(1)		—		(1)		(1)
Net benefit expense (income)	$	4	$	5	$	8	$	10	$	—	$	—	$	—	$	(1)