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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% |  |

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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