Summary of Currently Identifiable and Measurable Costs Reclassified in Consolidated Statements of Income by Segment Related to Production and Distribution Disruptions (Detail) - USD ($) $ in Thousands	3 Months Ended												4 Months Ended				12 Months Ended
	Dec. 29, 2018	[1]	Oct. 06, 2018	[1],[2]	Jul. 14, 2018	[1],[2]	Dec. 30, 2017	[1]	Oct. 07, 2017	[1],[2]	Jul. 15, 2017	[1],[2]	Apr. 21, 2018	[1],[2]	Apr. 22, 2017	[1],[2]	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Loss On Inferior Ingredients [Line Items]
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately)	$ 467,155		$ 485,680		$ 488,871		$ 456,895		$ 476,264		$ 468,246		$ 625,122		$ 608,068		$ 2,066,828	$ 2,009,473	$ 2,026,859
Selling, distribution and administrative expenses																	1,507,256	$ 1,510,015	$ 1,469,382
DSD Segment
Loss On Inferior Ingredients [Line Items]
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately)																	951
Selling, distribution and administrative expenses																	704
Warehouse Segment
Loss On Inferior Ingredients [Line Items]
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately)																	1,557
DSD and Warehouse Segment
Loss On Inferior Ingredients [Line Items]
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately)																	2,508
Selling, distribution and administrative expenses																	$ 704

[1] The company does not report gross margin. This line item presents our material, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately) under an alternative presentation.

[2] As disclosed in Note 4, Financial Statement Revisions, the company reported cash receipts and payments for the repurchase and sale of territories and cash paid at issuance of notes receivable at net when these transactions should have been disaggregated. We concluded that the errors were not material to any of these prior periods that were impacted. The error resulted in an understatement of cash flows from operating activities and cash flows used in investing activities of $5.9 million, $12.1 million and $12.8 million, respectively, for the sixteen, twenty-eight, and forty-week amounts included in the first, second, and third quarters of fiscal 2017, respectively.  These amounts were revised upon subsequent presentation of these financial statements.