Other (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 24, 2017	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016
Other Expense [Line Items]
Advertising expense		$ 156,300	$ 118,600	$ 89,800
Depreciation expense		59,011	61,871	61,723
Severance liability		8,400	18,800
Capitalized Computer Software Costs [Member]
Other Expense [Line Items]
Depreciation expense		15,700	12,800	11,500
Unamortized intangible assets		29,500	28,100
Selling, General and Administrative Expenses [Member]
Other Expense [Line Items]
Severance costs			23,900	18,800
Headquarters Redesign and Consolidation [Member]
Other Expense [Line Items]
Total restructuring costs incurred	$ 10,100	4,500
Capital expenditures related to restructuring costs		15,000	$ 62,000
Employee Severance [Member] | Selling, General and Administrative Expenses [Member]
Other Expense [Line Items]
Severance costs		$ 6,700
Employee Severance [Member] | Streamlining of International Print Operations [Member]
Other Expense [Line Items]
Total restructuring costs incurred to date				11,900
Relocation Charges [Member] | Streamlining of International Print Operations [Member]
Other Expense [Line Items]
Total restructuring costs incurred to date				2,900
Accounting Standards Update 2017-07 [Member]
Other Expense [Line Items]
Restructuring charges reclassified into other components of net periodic benefit costs				$ 1,700