Pension and Postretirement Plans (Tables)

9 Months Ended

Nov. 02, 2019

Pension and Postretirement Plans [Abstract]

Net Benefit Expense (Income)

	Pension Benefits								Postretirement Benefits
	Thirteen weeks ended				Thirty-nine weeks ended					Thirteen weeks ended			Thirty-nine weeks ended
		Nov. 2		Nov. 3		Nov. 2		Nov. 3		Nov. 2		Nov. 3		Nov. 2		Nov. 3
		2019		2018		2019		2018		2019		2018		2019		2018
	($ in millions)
Service cost	$	5	$	5	$	15	$	14	$	—	$	—	$	—	$	—
Interest cost		7		8		20		21		—		—		—		—
Expected return on plan assets		(9)		(10)		(27)		(29)		—		—		—		—
Amortization of net loss (gain)		3		3		9		9		—		—		(1)		(1)
Net benefit expense (income)	$	6	$	6	$	17	$	15	$	—	$	—	$	(1)	$	(1)