Summary of Significant Accounting Policies - Narrative (Detail)	12 Months Ended
	Dec. 31, 2017 USD ($) Brand	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Period of credit terms	30 days
Provisional income tax expense (benefit) related to repatriation of foreign earnings	$ 2,100,000
Advertising expense	39,100,000	$ 59,600,000	$ 44,800,000
Prepaid advertising expenses	500,000	1,900,000	700,000
Shipping and handling costs	1,200,000,000	1,100,000,000	1,200,000,000
Research and development expense	3,500,000	3,000,000	2,300,000
Prepaid Expenses and Other Current Assets
Summary Of Significant Accounting Policies [Line Items]
Assets held for sale	$ 0	0
Minimum
Summary Of Significant Accounting Policies [Line Items]
Number of local and regional brands and private labels (more than) | Brand	50
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Effect on cost of goods sold	$ (606,900,000)	$ (551,500,000)	$ (577,400,000)