Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Funded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 40,481	$ 44,623	$ 41,813
Interest cost	49,522	44,654	42,029
Expected return on plan assets	(65,187)	(60,474)	(54,759)
Amortization of net actuarial loss	13,848	28,070	25,373
Expense related to current period	38,664	56,873	54,456
Correction of prior years pension accruals			26,964
Total expense	38,664	56,873	81,420
Net (gain) loss	209,091	(89,265)	61,692
Amortization of net (loss)	(13,848)	(28,070)	(25,373)
Plan amendment	3,067
Total recognized in other comprehensive income	198,310	(117,335)	36,319
Total recognized in net periodic benefit cost and other comprehensive income	236,974	(60,462)	117,739
Discount rate	5.00%	4.40%	4.80%
Expected rate of return on plan assets	7.00%	7.00%	7.40%
Rate of compensation increase	4.00%	4.00%	4.00%
Unfunded Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,398	1,716	1,448
Interest cost	3,001	2,447	2,321
Amortization of prior service cost	2	3	3
Amortization of net actuarial loss	2,146	2,884	1,465
Expense related to current period	6,547	7,050	5,237
Total expense	6,547	7,050	5,237
Net (gain) loss	19,552	(2,925)	6,666
Amortization of net (loss)	(2,146)	(2,884)	(1,465)
Plan amendment	(2)	(3)	(3)
Total recognized in other comprehensive income	17,404	(5,812)	5,198
Total recognized in net periodic benefit cost and other comprehensive income	$ 23,951	$ 1,238	$ 10,435
Discount rate	4.80%	4.00%	4.40%
Rate of compensation increase	6.00%	6.00%	6.00%

Defined Benefit Plan Net Periodic Benefit Costs Current

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- Definition

Correction of prior years pension accruals, impact on current year/additional expense.

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No definition available.

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- Definition

Other comprehensive income defined benefit plan amortization of net.

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- Definition

Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Plan Amendments, before Tax

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- Definition

The amount of gains or losses recognized in net periodic benefit cost.

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Amount before tax, after reclassification adjustments, of actuarial gain (loss) that has not been recognized in the income statement.

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Amount before tax, after reclassification adjustments, of prior service cost (credit) that has not been recognized in the income statement.

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- Definition

The interest rate used to adjust for the time value of money.

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Long-Term Rate of Return on Plan Assets

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-SubTopic 20

-Section 50

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- Definition

Expected rate of compensation increases (for pay-related plans).

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- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512136

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-Topic 715

-SubTopic 60

-Glossary Expected Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512171

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-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)(3)

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- Definition

Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

+ References

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- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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- Definition

The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)(1)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Service Cost (Component of Net Periodic Pension Cost)

-URI http://asc.fasb.org/extlink&oid=6525008

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-Publisher FASB

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-Topic 715

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-Subparagraph (a)(1)

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Amount before tax, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (i-k)

-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

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