Pension Plans and Other Retirement Benefits - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended	4 Months Ended	8 Months Ended	12 Months Ended
	Nov. 03, 2018	Feb. 02, 2019	Sep. 30, 2018	Jan. 30, 2021	Feb. 01, 2020	Feb. 02, 2019
Net periodic pension cost:
Settlement charge				$ 0	$ 0	$ 36,122
Funded Plan
Net periodic pension cost:
Service cost				50,123	44,685	45,342
Interest cost				50,210	52,172	54,355
Expected return on plan assets				(88,997)	(74,141)	(79,190)
Amortization of prior service cost				377	377	377
Amortization of net actuarial loss				22,351	19,055	12,250
Settlement charge	$ (36,000)			0	0	36,122
Total expense				34,064	42,148	69,256
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net (gain) loss				(48,838)	71,590	68,770
Amortization of net (loss)				(22,351)	(19,055)	(12,250)
Settlement charge				0	0	(36,122)
Amortization of prior service cost				(377)	(377)	(377)
Total recognized in other comprehensive income (loss)				(71,566)	52,158	20,021
Total recognized in net periodic benefit cost and other comprehensive income (loss)				$ (37,502)	$ 94,306	$ 89,277
Discount rate		4.40%	4.00%	3.30%	4.30%
Expected rate of return on plan assets		6.00%	6.00%	5.75%	6.00%
Rate of compensation increase				4.00%	4.00%	4.00%
Unfunded Plan
Net periodic pension cost:
Service cost				$ 2,430	$ 2,059	$ 2,391
Interest cost				3,283	3,740	3,600
Amortization of net actuarial loss				4,616	3,124	3,409
Total expense				10,329	8,923	9,400
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net (gain) loss				8,229	4,682	5,955
Amortization of net (loss)				(4,616)	(3,124)	(3,409)
Total recognized in other comprehensive income (loss)				3,613	1,558	2,546
Total recognized in net periodic benefit cost and other comprehensive income (loss)				$ 13,942	$ 10,481	$ 11,946
Discount rate				3.10%	4.10%	3.80%
Rate of compensation increase				4.00%	6.00%	6.00%
Unfunded Plan | Primary Benefit
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Rate of compensation increase					6.00%	6.00%
Unfunded Plan | Alternative Benefit
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Rate of compensation increase				4.00%