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Income Taxes (Effective Income Tax Rate - Table) (Details)
12 Months Ended
Dec. 27, 2015
Dec. 28, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Income taxes at federal statutory rate 35.00% 35.00% 35.00%
State and local income taxes, net of federal benefit 2.30% 3.20% 3.60%
Valuation allowance on deferred income tax assets 1.70% 1.50% (30.60%)
Employment-related credits, net (15.80%) (24.20%) (22.30%)
Net life insurance expense (0.30%) (0.80%) (1.60%)
Noncontrolling interests (0.80%) (1.20%) (2.80%)
Tax settlements and related adjustments (0.10%) 1.70% 0.70%
Gain on remeasurement of equity method investment 0.00% 0.00% (6.80%)
Foreign rate differential 0.60% 2.70% (1.40%)
Other, net 0.40% 2.10% 1.70%
Total 23.00% 20.00% (24.50%)