Stockholders' Equity Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2014		Dec. 29, 2013	Dec. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning	$ (402,611)
Income tax expense	(86,110)		73,165	(10,760)
Other comprehensive (loss)/income, net of tax	(131,785)		110,517	(15,512)
Balance, ending	(533,795)		(402,611)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning	12,674
Other comprehensive income before reclassifications, before tax(1)	(11,006)	[1]
Amounts reclassified from accumulated other comprehensive loss, before tax(1)	0	[1]
Income tax expense	(4,037)	[1]
Other comprehensive (loss)/income, net of tax	(6,969)
Balance, ending	5,705
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning	(415,285)
Other comprehensive income before reclassifications, before tax(1)	(267,771)	[1]
Amounts reclassified from accumulated other comprehensive loss, before tax(1)	61,483	[1]
Income tax expense	(82,073)	[1]
Other comprehensive (loss)/income, net of tax	(124,215)
Balance, ending	(539,500)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning	(402,611)
Other comprehensive income before reclassifications, before tax(1)	(278,777)	[1]
Amounts reclassified from accumulated other comprehensive loss, before tax(1)	61,483	[1]
Income tax expense	(86,110)	[1]
Other comprehensive (loss)/income, net of tax	(131,184)		109,955	(15,508)
Balance, ending	$ (533,795)		$ (402,611)

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