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. 03, 2018	Oct. 28, 2017	Nov. 03, 2018	Oct. 28, 2017
Defined Benefit Plan Disclosure [Line Items]
Pension settlement charge	$ 36,122	$ 0	$ 36,122	$ 0
Funded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	10,781	11,655	34,007	35,264
Interest cost	12,837	13,866	40,767	41,384
Expected return on plan assets	(17,468)	(17,309)	(59,392)	(52,073)
Recognized actuarial losses	3,241	5,428	9,469	16,582
Expense related to current period	9,391	13,640	24,851	41,157
Pension settlement charge	36,122	0	36,122	0
Total expense	45,513	13,640	60,973	41,157
Unfunded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	572	403	1,794	1,578
Interest cost	994	820	2,700	2,506
Expected return on plan assets	0	0	0	0
Recognized actuarial losses	914	641	2,556	2,305
Expense related to current period	2,480	1,864	7,050	6,389
Pension settlement charge	0	0	0	0
Total expense	$ 2,480	$ 1,864	$ 7,050	$ 6,389