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Benefits Expected to be Paid from Plans Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Pension plans |  |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |  |
Benefits paid |  | $ 23,843 | $ 24,408 |
2019 |  | 31,431 |  |
2020 |  | 327,280 |  |
2021 |  | 2,630 |  |
2022 |  | 2,715 |  |
2023 |  | 2,585 |  |
2024 – 2028 |  | 11,135 |  |
Pension plans | Includes Plan No 1 and No 2 Single Lump Sum |  |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |  |
Benefits paid | [1] |  |  | $ 40,864
Pension plans | Includes Plan No 1 and No 2 Single Lump Sum |  |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |  |
Benefits paid | [2] |  | 38,776 |
Pension plans | Includes Plan No 1 and No 2 Single Lump Sum |  |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |  |
Benefits paid | [3] | 48,722 |  |
Postretirement Benefit Plans |  |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |  |
Benefits paid |  | 2,131 | 706 |
Postretirement Benefit Plans | Employer Gross Contribution |  |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |  |
Benefits paid |  | 1,308 | $ 376 | $ 841
2019 |  | 1,041 |  |
2020 |  | 867 |  |
2021 |  | 812 |  |
2022 |  | 732 |  |
2023 |  | 696 |  |
2024 – 2028 |  | $ 3,608 |  |
[1] | Includes $15.7 million and $1.6 million from Plan No. 1 and Plan No. 2, respectively, paid as lump sums.
[2] | Includes $14.4 million and $1.6 million from Plan No. 1 and Plan No. 2, respectively, paid as lump sums.
[3] | Includes $24.9 million and $1.5 million from Plan No. 1 and Plan No. 2, respectively, paid as lump sums.

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- Definition Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] + References No definition available. + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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