Stockholders' Equity Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense		$ 16,988	$ (86,110)	$ 73,165
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	[1]	20,103
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Effect of other postretirement benefit remeasurement		(1,145)
Total recognized in other comprehensive (income)/loss	[2]	75,728
Income tax expense		30,132
Total reclassification, net of tax		45,596
Selling, General and Administrative Expenses [Member] | Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service credit	[3]	(11,440)
Amortization of actuarial loss	[3]	46,720
Discontinued Operations [Member] | Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Effect of curtailment		1,264
Pension settlement charge		$ 40,329

[1] All amounts are shown net of noncontrolling interest.

[2] There were no reclassifications relating to noncontrolling interest for the year ended December 27, 2015.

[3] These accumulated other comprehensive income components are included in the computation of net periodic benefit cost for pension and other retirement benefits. See Notes 9 and 10 for additional information