Summary of Significant Accounting Policies (Detail)	12 Months Ended
	Dec. 30, 2017 USD ($) Customer shares	Dec. 31, 2016 USD ($) Customer	Jan. 02, 2016 USD ($)
Schedule Of Significant Accounting Policies [Line Items]
Accounts receivable collection period	30 days
LIFO balance sheet reserves	$ 130,000,000	$ 116,000,000
Effect of LIFO reserves on cost of goods sold increase decrease	14,000,000	(18,000,000)	$ (74,000,000)
Shipping and handling costs	$ 1,600,000,000	$ 1,600,000,000	$ 1,500,000,000
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Schedule Of Significant Accounting Policies [Line Items]
Number of customers | Customer	1	1
Concentration risk, percentage	5.00%	5.00%
2007 Plan [Member] | Employee Stock Purchase Plan [Member]
Schedule Of Significant Accounting Policies [Line Items]
common stock available for future issuance | shares	0
Minimum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	3 years
Risk reduction strategy	$ 1,000,000
Maximum [Member]
Schedule Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	40 years
Risk reduction strategy	$ 10,000,000
Maximum [Member] | Employee Stock Purchase Plan [Member]
Schedule Of Significant Accounting Policies [Line Items]
Purchase of common stock discount, percentage	15.00%