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Inventories (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Inventory, Net [Abstract]      
Percentage of LIFO Inventory 89.00% 89.00%  
Inventory, LIFO Reserve, Effect on Income, Net $ (101,300) $ 39,800 $ (2,700)
Purchasing and Warehousing costs included in inventory 476,300 435,200  
LIFO Method Related Items [Abstract]      
Inventories at first in, first out (“FIFO”) 4,290,565 4,119,617  
Adjustments to state inventories at LIFO 141,603 242,930  
Inventories at LIFO $ 4,432,168 $ 4,362,547