Supplemental Stockholders' Equity Information Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2015		Mar. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning	$ (533,795)
Income tax expense	16,320		2,701
Other comprehensive income, net of tax	24,491		3,894
Balance, ending	(509,304)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning	5,705
Other comprehensive income before reclassifications, before tax	(8,527)	[1]
Amounts reclassified from accumulated other comprehensive loss, before tax	0	[1]
Income tax expense	(3,273)	[1]
Other comprehensive income, net of tax	(5,254)
Balance, ending	451
Funded Status of Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning	(539,500)
Other comprehensive income before reclassifications, before tax	0	[1]
Amounts reclassified from accumulated other comprehensive loss, before tax	49,338	[1]
Income tax expense	19,593	[1]
Other comprehensive income, net of tax	29,745
Balance, ending	(509,755)
Total Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning	(533,795)
Other comprehensive income before reclassifications, before tax	(8,527)	[1]
Amounts reclassified from accumulated other comprehensive loss, before tax	49,338	[1]
Income tax expense	16,320	[1]
Other comprehensive income, net of tax	24,491		3,894
Balance, ending	$ (509,304)

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