Pension Plans and Other Retirement Benefits - Financial Information Related to Funded Defined Benefit Pension Plan and Unfunded Supplemental Pension Plan (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 02, 2019	Nov. 03, 2018	Nov. 02, 2019	Nov. 03, 2018
Defined Benefit Plan Disclosure [Line Items]
Pension settlement charge	$ 0	$ 36,122	$ 0	$ 36,122
Funded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	11,415	10,781	33,513	34,007
Interest cost	13,149	12,837	39,129	40,767
Expected return on plan assets	(18,630)	(17,468)	(55,606)	(59,392)
Amortization of net actuarial loss and prior service cost	5,556	3,241	14,574	9,469
Expense related to current period	11,490	9,391	31,610	24,851
Pension settlement charge	0	36,122	0	36,122
Total expense	11,490	45,513	31,610	60,973
Unfunded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	440	572	1,544	1,794
Interest cost	871	994	2,805	2,700
Expected return on plan assets	0	0	0	0
Amortization of net actuarial loss and prior service cost	471	914	2,343	2,556
Expense related to current period	1,782	2,480	6,692	7,050
Pension settlement charge	0	0	0	0
Total expense	$ 1,782	$ 2,480	$ 6,692	$ 7,050