Basis Of Presentation And Significant Accounting Policies - Dreamcatcher (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 28, 2014	Sep. 30, 2015	Sep. 28, 2014	Dec. 28, 2014
Variable Interest Entity [Line Items]
Operating revenues	$ 488,594	$ 474,858	$ 1,462,855	$ 1,395,939
Operating profit	38,808	55,285	119,527	137,738
Property, plant and equipment, net	820,093		820,093		$ 850,597
Broadcast rights	309,083		309,083		157,014
Other intangible assets, net	2,296,033		2,296,033		2,397,794
Other assets	178,617		178,617		189,254
Total Assets	10,413,399		10,413,399		11,396,455
Debt due within one year	26,488		26,488		4,088
Contracts payable for broadcast rights	253,941		253,941		178,685
Long-term debt	3,459,158		3,459,158		3,490,897
Other obligations	64,142		64,142		64,917
Dreamcatcher | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Operating revenues	16,000	16,000	48,000	48,000
Operating profit	2,000	$ 3,000	9,000	$ 9,000
Property, plant and equipment, net	528		528		999
Broadcast rights	3,734		3,734		2,869
Other intangible assets, net	95,601		95,601		103,500
Other assets	256		256		124
Total Assets	100,119		100,119		107,492
Debt due within one year	4,036		4,036		4,034
Contracts payable for broadcast rights	4,086		4,086		6,552
Long-term debt	15,840		15,840		19,880
Other obligations	0		0		157
Total Liabilities	$ 23,962		$ 23,962		$ 30,623