Business Acquisitions - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 29, 2018 USD ($) business	Dec. 30, 2017 USD ($)	Dec. 30, 2017 broadline_distributor	Dec. 30, 2017 specialty_distributor
Business Combinations [Abstract]
Business acquisitions	0		3	2
Cash consideration for acquisition		$ 182
Earnout contingent consideration paid for business acquisition	$ 5	8
Contingent consideration included as part of fair value of assets and liabilities as on acquisition date		$ 6