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		6 Months Ended
	Aug. 03, 2019	Aug. 04, 2018	Aug. 03, 2019	Aug. 04, 2018
Funded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 11,049	$ 11,613	$ 22,098	$ 23,226
Interest cost	12,990	13,965	25,980	27,930
Expected return on plan assets	(18,488)	(20,962)	(36,976)	(41,924)
Recognized actuarial losses	4,509	3,114	9,018	6,228
Total expense	10,060	7,730	20,120	15,460
Unfunded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	552	611	1,104	1,222
Interest cost	967	853	1,934	1,706
Expected return on plan assets	0	0	0	0
Recognized actuarial losses	936	821	1,872	1,642
Total expense	$ 2,455	$ 2,285	$ 4,910	$ 4,570