Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended		12 Months Ended
	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) Brand		Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jan. 01, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Assets held for sale			$ 8,472,000		$ 0
Cost of goods and services sold			$ 6,100,005,000		5,976,958,000	$ 5,722,112,000
Period of credit terms			30 days
Repatriation of foreign earnings related to the Tax Act	$ 9,900,000
Advertising expense			$ 41,600,000		39,100,000	59,600,000
Prepaid advertising expenses			0		500,000	1,900,000
Research and development expense			4,400,000		3,500,000	3,000,000
Prepaid Expenses and Other Current Assets
Summary Of Significant Accounting Policies [Line Items]
Assets held for sale			$ 8,500,000		0
Minimum
Summary Of Significant Accounting Policies [Line Items]
Number of local and regional brands and private labels (more than) | Brand			50
Accounting Standards Update 2016-02 | Minimum | Forecast
Summary Of Significant Accounting Policies [Line Items]
Right-of-use lease asset							$ 330,000,000
Lease liability							330,000,000
Accounting Standards Update 2016-02 | Maximum | Forecast
Summary Of Significant Accounting Policies [Line Items]
Right-of-use lease asset							360,000,000
Lease liability							$ 360,000,000
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Cost of goods and services sold			$ 515,162,000		(606,900,000)	(551,500,000)
Shipping and Handling
Summary Of Significant Accounting Policies [Line Items]
Cost of goods and services sold			1,200,000,000		$ 1,200,000,000	$ 1,100,000,000
Retained Earnings (Accumulated Deficit)
Summary Of Significant Accounting Policies [Line Items]
Reclassification of stranded tax effects related to the Tax Act		$ 16,800,000	$ 16,847,000	[1]

[1] Refer to Note 1 - Recently Adopted Accounting Pronouncements within our Notes to Consolidated Financial Statements for additional details on the adoption of ASU No. 2018-02 during the first quarter of 2018.