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. 28, 2014		Dec. 29, 2013		Dec. 30, 2012
Change in benefit obligations
Settlements	$ 0		$ (10,743)
Benefit obligations at end of year	3,999,804
Change in plan assets
Fair value of plan assets at beginning of year	3,028,467	[1]
Settlements	0		(10,743)
Fair value of plan assets at end of year	3,042,514	[1]	3,028,467	[1]
Funded status at end of year	(957,290)
Amounts recognized in Consolidated Balance Sheets
Accrued benefit cost—noncurrent	(941,715)		(632,195)
Retirement Plans
Change in benefit obligations
Benefit obligations at beginning of year	3,672,249		3,573,085
Service cost	5,311		7,538		7,545
Interest cost	168,991		141,030		155,376
Plan amendments	0		177
Plan participants’ contributions	5		4
Actuarial loss (gain)	438,296		(104,131)
Foreign currency translation	(57,779)		21,758
Gross benefits paid	(227,269)		(230,979)
Acquisitions	0		274,510
Benefit obligations at end of year	3,999,804		3,672,249		3,573,085
Change in plan assets
Fair value of plan assets at beginning of year	3,028,467		2,552,316
Actual return on plan assets	180,033		364,652
Plan participants’ contributions	5		4
Employer contributions	103,933		107,086
Gross benefits paid	(227,269)		(230,979)
Acquisitions	0		229,774
Foreign currency translation	(42,655)		16,357
Fair value of plan assets at end of year	3,042,514		3,028,467		2,552,316
Funded status at end of year	(957,290)		(643,782)
Amounts recognized in Consolidated Balance Sheets
Noncurrent assets	0		3,684
Accrued benefit cost—current	(15,575)		(15,271)
Accrued benefit cost—noncurrent	$ (941,715)		$ (632,195)

[1] We use a Dec. 31 measurement date for our retirement plans.