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. 30, 2012		Dec. 25, 2011		Dec. 26, 2010
Change in benefit obligations
Settlements	$ (23,489)		$ 0
Benefit obligations at end of year	3,573,085
Change in plan assets
Fair value of plan assets at beginning of year	2,518,515	[1]
Settlements	(23,489)		0
Fair value of plan assets at end of year	2,594,250	[1]	2,518,515	[1]
Funded status at end of year	(1,020,769)
Amounts recognized in Consolidated Balance Sheets
Accrued benefit cost-long-term	(1,007,325)		(908,110)
Pension Plans, Defined Benefit
Change in benefit obligations
Benefit obligations at beginning of year	3,351,494		3,217,877
Service cost	7,545		7,833		14,829
Interest cost	155,376		171,339		176,738
Plan amendments	0		1,297
Plan participants' contributions	7		3,885
Actuarial gain (loss)	300,525		182,789
Foreign currency translation	27,526		5,740
Gross benefits paid	(245,899)		(240,334)
Special termination benefit	0		1,068
Benefit obligations at end of year	3,573,085		3,351,494		3,217,877
Change in plan assets
Fair value of plan assets at beginning of year	2,408,768		2,588,728
Actual return on plan assets	254,225		(6,537)
Plan participants' contributions	7		3,885
Employer contributions	137,499		56,392
Gross benefits paid	(245,899)		(240,334)
Foreign currency translation	21,205		6,634
Fair value of plan assets at end of year	2,552,316		2,408,768		2,588,728
Funded status at end of year	(1,020,769)		(942,726)
Amounts recognized in Consolidated Balance Sheets
Accrued benefit cost-current	(13,444)		(34,616)
Accrued benefit cost-long-term	$ (1,007,325)		$ (908,110)

[1] The company uses a Dec. 31 measurement date for its retirement plans.