Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands		12 Months Ended
Sep. 30, 2016	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Settlement charge			$ 31,173
Expected rate of return on plan assets	6.50%		6.00%
Rate of compensation increase	4.80%		3.80%
Funded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 46,845	$ 45,440	$ 50,080
Interest cost		55,301	56,094	51,710
Expected return on plan assets		(69,345)	(70,535)	(78,042)
Amortization of prior service cost		377	377	377
Amortization of net actuarial loss		21,557	31,397	33,146
Settlement charge			31,173
Total expense		54,735	93,946	57,271
Net (gain) loss		(38,293)	17,894	(19,731)
Amortization of net (loss)		(21,557)	(31,397)	(33,146)
Settlement charge			(31,173)
Amortization of prior service cost		(377)	(377)	(377)
Total recognized in other comprehensive income (loss)		(60,227)	(45,053)	(53,254)
Total recognized in net periodic benefit cost and other comprehensive income (loss)		$ (5,492)	$ 48,893	$ 4,017
Discount rate		4.40%		4.00%
Expected rate of return on plan assets		6.00%		6.75%
Rate of compensation increase		4.00%	4.00%	4.00%
Funded Plan \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount rate			3.80%
Expected rate of return on plan assets			6.00%
Funded Plan \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount rate			4.80%
Expected rate of return on plan assets			6.50%
Unfunded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 1,888	$ 1,835	$ 1,562
Interest cost		3,316	3,391	3,033
Amortization of net actuarial loss		2,852	3,349	3,958
Total expense		8,056	8,575	8,553
Net (gain) loss		4,580	740	3,806
Amortization of net (loss)		(2,852)	(3,349)	(3,958)
Total recognized in other comprehensive income (loss)		1,728	(2,609)	(152)
Total recognized in net periodic benefit cost and other comprehensive income (loss)		$ 9,784	$ 5,966	$ 8,401
Discount rate		4.00%	4.20%	3.70%
Rate of compensation increase		6.00%	6.00%	6.00%

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount, before tax, after reclassification adjustment, of increase (decrease) in accumulated other comprehensive income from gain (loss) of defined benefit plan.

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-Publisher FASB
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Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income from prior service cost (credit) of defined benefit plan.

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Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

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Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

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Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

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Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, before tax, of increase (decrease) to other comprehensive income from settlement and curtailment gain (loss) of defined benefit plan.

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Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.

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