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Summary of AOCI exclusive of reclassification (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax | $ 8,457 | $ 2,978 | $ (6,789)
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax | 457 | (16,853) | (9,426)
Derivative Instruments |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments before tax | 11,313 | 3,984 | (9,734)
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments tax benefit (expense) | (2,856) | (1,006) | 2,945
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax | 8,457 | 2,978 | (6,789)
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax | 8,457 | 2,978 |
Current Year Actuarial Loss |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Current year, before tax | (10,702) | (26,528) | (4,307)
Accumulated Defined Benefit Plans Adjustment |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Current year, before tax | (10,702) | (26,528) | (4,307)
Amount of Gain (Loss) Recognized in AOCI, Current year, tax benefit (expense) | 2,702 | 6,697 | 1,670
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax | (8,000) | (19,831) | (2,637)
Commodity Contract |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax | 8,457 | 2,978 | (6,789)
Commodity Contract | Derivative Instruments |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments before tax | $ 11,313 | $ 3,984 | $ (9,734)

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