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Supplemental Equity Information - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 27, 2015	Sep. 30, 2016	Sep. 27, 2015
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance			$ 2,456,744	$ 3,489,273
Other comprehensive income (loss), net of tax	$ (4,641)	$ 35,741	(12,234)	51,921
Ending Balance	2,496,158	2,384,019	2,496,158	2,384,019
Retirement Plans
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(113,854)	(1,156,458)	(116,496)	(1,172,245)
Other comprehensive loss before reclassifications	0	38,984	0	35,466
Amounts reclassified from AOCL	1,075	2,310	3,717	21,615
Other comprehensive income (loss), net of tax	1,075	41,294	3,717	57,081
Spin-off publishing businesses		1,012,745		1,012,745
Ending Balance	(112,779)	(102,419)	(112,779)	(102,419)
Foreign Currency Translation
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(23,282)	393,712	(20,129)	391,113
Other comprehensive loss before reclassifications	(1,043)	(2,663)	(4,196)	(64)
Amounts reclassified from AOCL	0	0	0	0
Other comprehensive income (loss), net of tax	(1,043)	(2,663)	(4,196)	(64)
Spin-off publishing businesses		(409,275)		(409,275)
Ending Balance	(24,325)	(18,226)	(24,325)	(18,226)
Other
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	1,399	2,363	5,674	2,363
Other comprehensive loss before reclassifications	(3,742)	(518)	(8,017)	(518)
Amounts reclassified from AOCL	0	0	0	0
Other comprehensive income (loss), net of tax	(3,742)	(518)	(8,017)	(518)
Spin-off publishing businesses		0		0
Ending Balance	(2,343)	1,845	(2,343)	1,845
Total
Increase (Decrease) in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(135,737)	(760,383)	(130,951)	(778,769)
Other comprehensive loss before reclassifications	(4,785)	35,803	(12,213)	34,884
Amounts reclassified from AOCL	1,075	2,310	3,717	21,615
Other comprehensive income (loss), net of tax	(3,710)	38,113	(8,496)	56,499
Spin-off publishing businesses		603,470		603,470
Ending Balance	$ (139,447)	$ (118,800)	$ (139,447)	$ (118,800)

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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