Retirement Benefit Plans (Tables)

9 Months Ended

Oct. 31, 2020

Retirement Benefit Plans [Abstract]

Schedule of Pension Plan Expense/(Income)

The components of net periodic pension expense/(income) for our non-contributory qualified defined benefit pension plan and supplemental pension plans were as follows:

	Three Months Ended				Nine Months Ended
($ in millions)	October 31, 2020		November 2, 2019		October 31, 2020		November 2, 2019
Service cost	$	5	$	7	$	21	$	21
Other components of net periodic pension cost/(income):
Interest cost	23		33		75		99
Expected return on plan assets	(50)		(48)		(151)		(144)
Amortization of prior service cost	1		2		4		6
Settlement expense	16		—		16		—
Amortization of net loss	—		—		1		—
Curtailment loss recognized	—		—		5		—
Special termination benefit cost recognized	—		—		94		—
	(10)		(13)		44		(39)
Net periodic pension expense/(income)	$	(5)	$	(6)	$	65	$	(18)