Revisions to Applicable Consolidated Statements of Cash Flows Line Item to Correct the Errors (Detail) - USD ($) $ in Thousands		3 Months Ended		4 Months Ended	12 Months Ended
		Oct. 07, 2017	Jul. 15, 2017	Apr. 22, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Other reconciling items to net income							$ (106)
Other assets					$ 5,120	$ (12,557)	(3,441)
Other accrued liabilities					(70,733)	42,770	11,390
Net cash provided by operating activities					295,893	297,389	356,562
Repurchase of independent distributor territories					(3,128)	(6,460)	(8,871)
Cash paid at issuance of notes receivable					(28,454)	(25,566)	(8,577)
Other investing activities					577	1,823	2,522
Net cash disbursed for investing activities					$ (301,805)	$ (35,395)	(76,714)
Impact Of Adopting New Guidance
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Other reconciling items to net income	[1]						3,851
Net cash provided by operating activities	[1]						3,851
As reported
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Other reconciling items to net income							(3,957)
Other assets							(11,107)
Other accrued liabilities							12,389
Net cash provided by operating activities							346,044
Repurchase of independent distributor territories							(10,350)
Other investing activities							2,091
Net cash disbursed for investing activities							(70,047)
Revisions
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Other assets							7,666
Other accrued liabilities							(999)
Net cash provided by operating activities		$ (12,800)	$ (12,100)	$ (5,900)			6,667
Repurchase of independent distributor territories							1,479
Cash paid at issuance of notes receivable							(8,577)
Other investing activities							431
Net cash disbursed for investing activities		$ (12,800)	$ (12,100)	$ (5,900)			$ (6,667)

[1] The table above includes the impact of adopting new share-based payment guidance discussed in Note 3, Recent Accounting Pronouncements.