Pension Benefits - Changes in Benefit Obligation and Plan Assets (Details) (USD $)	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Amount recognized in accumulated other comprehensive loss
Accumulated benefit obligation	$ 2,030,000,000	$ 2,260,000,000
Qualified Plans [Member]
Change in benefit obligation
Benefit obligation at beginning of year	1,965,406,000	1,943,882,000
Service cost	11,225,000	11,903,000	12,079,000
Interest cost	77,136,000	94,113,000	98,206,000
Plan participants’ contributions	26,000	32,000
Amendments	0	(31,839,000)
Actuarial (gain)/loss	(161,348,000)	162,569,000
Lump-sum settlement paid	0	(112,404,000)
Benefits paid	(113,798,000)	(89,340,000)
Effect of sale of Regional Media Group	0	(13,510,000)
Effects of change in currency conversion	0	0
Benefit obligation at end of year	1,778,647,000	1,965,406,000	1,943,882,000
Change in plan assets
Fair value of plan assets at beginning of year	1,615,723,000	1,464,729,000
Actual return on plan assets	122,030,000	217,371,000
Employer contributions	74,110,000	143,748,000
Lump-sum settlement paid	0	(112,404,000)
Effect of sale of Regional Media Group	0	(8,413,000)
Effect of change in currency conversion	0
Fair value of plan assets at end of year	1,698,091,000	1,615,723,000	1,464,729,000
Amount recognized in the Consolidated Balance Sheets
Current liabilities	0	0
Noncurrent liabilities	(80,556,000)	(349,683,000)
Net amount recognized	(80,556,000)	(349,683,000)
Amount recognized in accumulated other comprehensive loss
Actuarial loss	662,293,000	855,191,000
Prior service (credit)/cost	(28,510,000)	(30,454,000)
Total amount recognized in accumulated other comprehensive loss	633,783,000	824,737,000
Non-Qualified Plans [Member]
Change in benefit obligation
Benefit obligation at beginning of year	299,265,000	273,542,000
Service cost	1,162,000	1,656,000	1,660,000
Interest cost	10,681,000	12,635,000	13,112,000
Plan participants’ contributions	0	0
Amendments	0	0
Actuarial (gain)/loss	(18,960,000)	32,803,000
Lump-sum settlement paid	(10,667,000)	0
Benefits paid	(19,149,000)	(21,412,000)
Effect of sale of Regional Media Group	0	0
Effects of change in currency conversion	169,000	41,000
Benefit obligation at end of year	262,501,000	299,265,000	273,542,000
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	29,999,000	21,412,000
Lump-sum settlement paid	(10,667,000)	0
Effect of sale of Regional Media Group	0	0
Effect of change in currency conversion	(183,000)
Fair value of plan assets at end of year	0	0	0
Amount recognized in the Consolidated Balance Sheets
Current liabilities	(17,903,000)	(19,586,000)
Noncurrent liabilities	(244,598,000)	(279,679,000)
Net amount recognized	(262,501,000)	(299,265,000)
Amount recognized in accumulated other comprehensive loss
Actuarial loss	97,436,000	125,002,000
Prior service (credit)/cost	0	0
Total amount recognized in accumulated other comprehensive loss	97,436,000	125,002,000
Pension Plans, Defined Benefit [Member]
Change in benefit obligation
Benefit obligation at beginning of year	2,264,671,000	2,217,424,000
Service cost	12,387,000	13,559,000	13,739,000
Interest cost	87,817,000	106,748,000	111,318,000
Plan participants’ contributions	26,000	32,000
Amendments	0	(31,839,000)
Actuarial (gain)/loss	(180,308,000)	195,372,000
Lump-sum settlement paid	(10,667,000)	(112,404,000)
Benefits paid	(132,947,000)	(110,752,000)
Effect of sale of Regional Media Group	0	(13,510,000)
Effects of change in currency conversion	169,000	41,000
Benefit obligation at end of year	2,041,148,000	2,264,671,000	2,217,424,000
Change in plan assets
Fair value of plan assets at beginning of year	1,615,723,000	1,464,729,000
Actual return on plan assets	122,030,000	217,371,000
Employer contributions	104,109,000	165,160,000
Lump-sum settlement paid	(10,667,000)	(112,404,000)
Effect of sale of Regional Media Group	0	(8,413,000)
Effect of change in currency conversion	(183,000)
Fair value of plan assets at end of year	1,698,091,000	1,615,723,000	1,464,729,000
Amount recognized in the Consolidated Balance Sheets
Current liabilities	(17,903,000)	(19,586,000)
Noncurrent liabilities	(325,154,000)	(629,362,000)
Net amount recognized	(343,057,000)	(648,948,000)
Amount recognized in accumulated other comprehensive loss
Actuarial loss	759,729,000	980,193,000
Prior service (credit)/cost	(28,510,000)	(30,454,000)
Total amount recognized in accumulated other comprehensive loss	$ 731,219,000	$ 949,739,000