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Postretirement Plans - Additional Information (Detail) - USD ($) | 3 Months Ended | 4 Months Ended | 9 Months Ended
--- | --- | --- | ---
Oct. 03, 2020 | Oct. 05, 2019 | Jul. 13, 2019 | Apr. 18, 2020 | Apr. 20, 2019 | Oct. 03, 2020 | Oct. 05, 2019
Plan No. 1 |  |  |  |  |  |  |
Pension and Other Postretirement Benefits Disclosure [Line Items] |  |  |  |  |  |  |
Defined benefit plan assets, transferred |  |  |  | $ 6,400,000 |  |  |
Voluntarily contributions made by an employer |  | $ 0 | $ 0 | 1,400,000 | $ 0 |  |
Defined benefit plan, loan issued |  |  |  | 5,000,000.0 |  |  |
Defined benefit plans non-cash settlement charge | $ 109,100,000 |  |  | 116,200,000 |  | $ 109,100,000 |
Settlement loss |  |  |  | 111,900,000 |  | 104,800,000 | $ 0
Defined benefit plan obligation, curtailment loss |  |  |  | 4,300,000 |  | $ 4,300,000 |
Defined benefit plan, received refund of premium amount | 7,100,000 |  |  |  |  |  |
Defined benefit plan amount |  |  |  | $ 700,000 |  |  |
Plan No. 2 |  |  |  |  |  |  |
Pension and Other Postretirement Benefits Disclosure [Line Items] |  |  |  |  |  |  |
Voluntarily contributions made by an employer | $ 7,600,000 | $ 2,500,000 |  |  |  |  |

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- Definition Defined benefit plan amount transferred in cash for lumpsum payments and purchases. + References No definition available. + Details
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- Definition Defined benefit plan non cash pension termination charges. + References No definition available. + Details
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- Definition Pension and other postretirement benefits disclosure. + References No definition available. + Details
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- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from event reducing expected years of future service of present employees or eliminating accrual of defined benefits for some or all future services of present employees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -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)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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