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Reconciliation of Benefit Obligations, Plan Assets and Funded Status of Company-Sponsored Retirement Plans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011		Dec. 26, 2010		Dec. 27, 2009
Change in benefit obligations
Benefit obligations at end of year	$ 3,351,494
Change in plan assets
Fair value of plan assets at end of year	2,518,515	[1]	2,644,352	[1]
Funded status at end of year	(942,726)
Amounts recognized in Consolidated Balance Sheets
Accrued benefit cost-long-term	(908,110)		(619,340)
Pension Plans, Defined Benefit
Change in benefit obligations
Benefit obligations at beginning of year	3,217,877		3,088,364
Service cost	7,833		14,829		14,439
Interest cost	171,339		176,738		178,646
Plan amendments	1,297
Plan participants' contributions	3,885		7,595
Actuarial loss	182,789		189,382
Foreign currency translation	5,740		(24,259)
Gross benefits paid	(240,334)		(218,362)
Special termination benefit	1,068
Curtailments			(16,410)
Benefit obligations at end of year	3,351,494		3,217,877		3,088,364
Change in plan assets
Fair value of plan assets at beginning of year	2,588,728		2,375,767
Actual return on plan assets	(6,537)		269,263
Plan participants' contributions	3,885		7,595
Employer contributions	56,392		174,578
Gross benefits paid	(240,334)		(218,362)
Foreign currency translation	6,634		(20,113)
Fair value of plan assets at end of year	2,408,768		2,588,728		2,375,767
Funded status at end of year	(942,726)		(629,149)
Amounts recognized in Consolidated Balance Sheets
Long-term other assets			4,140
Accrued benefit cost-current	(34,616)		(13,949)
Accrued benefit cost-long-term	$ (908,110)		$ (619,340)
[1] The company uses a Dec. 31 measurement date for its retirement plans.

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