Summary of Significant Accounting Policies (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($) Customer shares	Jan. 02, 2016 USD ($) Customer shares	Dec. 27, 2014 USD ($)
Schedule Of Significant Accounting Policies [Line Items]
Accounts receivable collection period	30 days
Effect of LIFO liquidation on cost of sales | $	$ 0	$ 0	$ 7,000,000
LIFO balance sheet reserves | $	116,000,000	134,000,000
Effect of LIFO reserves on cost of goods sold | $	$ (18,000)	$ (74,000)	60,000
Common shares issued | shares	220,928,969	166,667,000
Common shares Outstanding | shares	220,928,969	166,667,000
Shipping and handling costs | $	$ 1,600,000,000	$ 1,500,000,000	$ 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%
Redeemable Common Stock [Member]
Schedule Of Significant Accounting Policies [Line Items]
Shares issued | shares		2,358,619
Shares outstanding | shares		2,358,619
Scenario, Previously Reported [Member]
Schedule Of Significant Accounting Policies [Line Items]
Common shares issued | shares		169,025,288
Common shares Outstanding | shares		169,025,288
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 | $	$ 3,000,000
Maximum [Member] | Employee Stock Purchase Plan [Member]
Schedule Of Significant Accounting Policies [Line Items]
Purchase of common stock discount, percentage	15.00%