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Changes to AOCI, Net of Income Tax, By Component (Detail) - USD ($)
$ in Thousands
4 Months Ended
Apr. 20, 2019
Apr. 21, 2018
Accumulated Other Comprehensive Income Loss [Line Items]    
Balances $ 1,258,267 $ 1,250,677
Reclassified to earnings from AOCI [1] (530) 4,889
Balances 1,267,926 1,291,531
Cash Flow Hedge Items    
Accumulated Other Comprehensive Income Loss [Line Items]    
Balances (4,135) (6,483)
Other comprehensive (loss) income before reclassifications (9,593) 10,470
Reclassified to earnings from AOCI (2,178) 297
Reclassified to retained earnings from AOCI   (1,709)
Balances (15,906) 2,575
Accumulated Defined Benefit Plans Adjustment    
Accumulated Other Comprehensive Income Loss [Line Items]    
Balances (105,036) (78,076)
Other comprehensive (loss) income before reclassifications   8,813
Reclassified to earnings from AOCI [1] 1,648 4,592
Reclassified to retained earnings from AOCI   (17,097)
Balances (103,388) (81,768)
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income Loss [Line Items]    
Balances (109,171) (84,559)
Other comprehensive (loss) income before reclassifications (9,593) 19,283
Reclassified to earnings from AOCI (530) 4,889
Reclassified to retained earnings from AOCI   (18,806)
Balances $ (119,294) $ (79,193)
[1] Amounts in parentheses indicate debits to determine net income (loss).