Impairments and Exit Costs (Surplus Properties) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 29, 2019 USD ($) properties	Dec. 30, 2018 USD ($) properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Surplus properties, carrying value		$ 21,505	$ 19,848
Other property [Member] | U.S. segment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Surplus properties, impairment losses	$ 10,700
Other property [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of surplus properties owned | properties		20	16
Other current assets, net [Member] | Assets held for sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Surplus properties, carrying value		$ 3,317	$ 4,594
Property, fixtures and equipment, net [Member] | Other property [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Surplus properties, carrying value		$ 18,188	$ 15,254