Property and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 2,140,361	$ 2,090,871
Less accumulated depreciation and amortization	1,252,753	1,204,628
Property and equipment, net	887,608	886,243
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	133,386	129,878
Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	713,128	693,898
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	1,069,616	1,054,986
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 224,231	$ 212,109
Minimum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Minimum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Minimum [Member] | Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Maximum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	60 years
Maximum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	12 years
Maximum [Member] | Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years