Summary of the Change in Net Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011
Goodwill [Roll Forward]
Goodwill before accumulated impairment losses beginning balance	$ 9,942,266	$ 9,893,120
Accumulated impairment losses beginning balance	(7,077,381)	(7,056,160)
Beginning Balance	2,864,885	2,836,960
Acquisitions & adjustments	61,988	28,715
Impairment	(90,053)
Foreign currency exchange rate changes	10,049	(790)
Goodwill before accumulated impairment losses beginning balance	10,096,342	9,942,266
Accumulated impairment losses ending balance	(7,249,473)	(7,077,381)
Ending Balance	2,846,869	2,864,885
Publishing
Goodwill [Roll Forward]
Goodwill before accumulated impairment losses beginning balance	7,643,255	7,599,030
Accumulated impairment losses beginning balance	(7,050,778)	(7,019,557)
Beginning Balance	592,477	579,473
Acquisitions & adjustments	22,747	11,215
Impairment	0
Foreign currency exchange rate changes	6,918	1,789
Goodwill before accumulated impairment losses beginning balance	7,754,959	7,643,255
Accumulated impairment losses ending balance	(7,132,817)	(7,050,778)
Ending Balance	622,142	592,477
Digital
Goodwill [Roll Forward]
Goodwill before accumulated impairment losses beginning balance	680,489	675,527
Accumulated impairment losses beginning balance	(26,603)	(36,603)
Beginning Balance	653,886	638,924
Acquisitions & adjustments	39,241	17,500
Impairment	(90,053)
Foreign currency exchange rate changes	3,051	(2,538)
Goodwill before accumulated impairment losses beginning balance	722,781	680,489
Accumulated impairment losses ending balance	(116,656)	(26,603)
Ending Balance	606,125	653,886
Broadcasting
Goodwill [Roll Forward]
Goodwill before accumulated impairment losses beginning balance	1,618,522	1,618,563
Accumulated impairment losses beginning balance	0	0
Beginning Balance	1,618,522	1,618,563
Acquisitions & adjustments	0	0
Impairment	0
Foreign currency exchange rate changes	80	(41)
Goodwill before accumulated impairment losses beginning balance	1,618,602	1,618,522
Accumulated impairment losses ending balance	0	0
Ending Balance	$ 1,618,602	$ 1,618,522