Pension, Postretirement and Postemployment Benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010	Dec. 27, 2009
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension expense	$ 35,500	$ 34,900	$ 41,100
Pension expense related to defined contribution plans	28,500	29,000	27,600
Defined benefit plan, number of major plans which principally cover non-union employees	2
Defined benefit plan, number of major plans that are funded	1
Postretirement health care and life insurance benefits eligibility terms	age 65 with 5 years of service or age 55 with 10 years of service
International Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension expense	2,758	2,333	4,903
Change in Projected Benefit Obligation [Roll Forward]
Projected benefit obligation - beginning	76,900
Projected benefit obligation - ending	82,904	76,900
Change in Plan Assets [Roll Forward]
Fair value of plan assets - beginning	68,762
Fair value of plan assets - ending	68,430	68,762
Reconciliation of Funded Status [Abstract]
Projected benefit obligation	(82,904)	(76,900)
Fair value of plan assets	68,430	68,762
Expected amortization of unrecognized net losses in next fiscal year	820
Expected amortization of unrecognized prior service cost in next fiscal year	37
Pension
Change in Projected Benefit Obligation [Roll Forward]
Projected benefit obligation - beginning	333,512	306,220
Service cost	1,729	2,018	1,642
Interest cost	16,852	17,014	17,358
Actuarial loss (gain)	14,845	28,197
Plan amendment	0	0
Benefits paid	(19,596)	(18,647)
Expenses paid	(1,187)	(1,290)
Projected benefit obligation - ending	346,155	333,512	306,220
Accumulated benefit obligation - ending	346,155	333,512	306,220
Change in Plan Assets [Roll Forward]
Fair value of plan assets - beginning	270,145	250,378
Actual return on plan assets	11,914	36,321
Employer contribution	3,799	3,383
Benefits and settlements paid	(19,596)	(18,647)
Expenses paid	(1,187)	(1,290)
Fair value of plan assets - ending	265,075	270,145	250,378
Reconciliation of Funded Status [Abstract]
Projected benefit obligation	(346,155)	(333,512)	(306,220)
Fair value of plan assets	265,075	270,145	250,378
Funded status	(81,080)	(63,367)
Unrecognized net loss	104,872	87,553
Unrecognized prior service cost	725	923
Net amount recognized	24,517	25,109
Accrued liabilities	(3,020)	(2,940)
Other liabilities	(78,060)	(60,427)
Accumulated other comprehensive earnings	105,597	88,476
Expected amortization of unrecognized net losses in next fiscal year	6,165
Expected amortization of unrecognized prior service cost in next fiscal year	193
Assumptions used to determine year-end pension and postretirement benefit obligations [Abstract]
Weighted average discount rate (in hundredths)	4.96%	5.20%
Mortality table	RP-2000	RP-2000
Pension | Funded [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligations in excess of the fair value of the plans' assets	43,522	25,086
Pension | Unfunded [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligations in excess of the fair value of the plans' assets	37,558	38,281
Postretirement [Member]
Change in Projected Benefit Obligation [Roll Forward]
Projected benefit obligation - beginning	34,492	30,873
Service cost	685	609	627
Interest cost	1,764	1,795	1,903
Actuarial loss (gain)	314	2,903
Plan amendment	0	273
Benefits paid	(2,059)	(1,961)
Expenses paid	0	0
Projected benefit obligation - ending	35,196	34,492	30,873
Accumulated benefit obligation - ending	35,196	34,492	30,873
Change in Plan Assets [Roll Forward]
Expenses paid	0	0
Reconciliation of Funded Status [Abstract]
Projected benefit obligation	(35,196)	(34,492)	(30,873)
Funded status	(35,196)	(34,492)
Unrecognized net loss	4,321	4,045
Unrecognized prior service cost	244	273
Net amount recognized	(30,631)	(30,174)
Accrued liabilities	(2,400)	(2,400)
Other liabilities	(32,796)	(32,092)
Accumulated other comprehensive earnings	4,565	4,318
Expected amortization of unrecognized net losses in next fiscal year	51
Expected amortization of unrecognized prior service cost in next fiscal year	$ 29
Assumptions used to determine year-end pension and postretirement benefit obligations [Abstract]
Weighted average discount rate (in hundredths)	5.17%	5.27%
Health care cost trend rate assumed for next year (in hundredths)	7.00%	7.50%
Rate to which the cost trend rate is assumed to decline (ultimate trend rate) (in hundredths)	5.00%	5.00%
Year that the rate reaches the ultimate trend	2020	2020