Pension, Postretirement and Postemployment Benefits, End of Fair Value Measurement (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010	Dec. 27, 2009
International Plans
Expected benefit payments under defined benefit pension plans and postretirement benefit plan for next five years [Abstract]
2012	$ 1,670
2013	1,810
2014	1,969
2015	2,241
2016	2,636
2017-2021	16,252
Projected benefit obligation	82,904	76,900
Fair value of plan assets	68,430	68,762
Expected amortization of unrecognized transition obligation in next fiscal year	(5)
Pension
Defined Benefit And Other Postretirement Benefit Plans [Line Items]
Fair value measurement, level 3 activity, purchases of investments	3,400
Fair value measurement, level 3 activity, capital distributions	1,500
Fair value measurement, level 3 activity, unrealized loss on plan assets still held	(1,000)
Shared long-term total return goal on plan assets (in hundredths)	7.25%	8.00%	8.50%
Components of net periodic cost [Abstract]
Service cost	1,729	2,018	1,642
Interest cost	16,852	17,014	17,358
Expected return on assets	(19,012)	(19,503)	(18,982)
Amortization of prior service cost	198	198	266
Amortization of actuarial loss	4,624	4,026	4,495
Curtailment/settlement losses	0	0	3,957
Net periodic benefit cost	4,391	3,753	8,736
Assumptions used to determine net periodic benefit cost of pension plan and postretirement plan [Abstract]
Weighted average discount rate (in hundredths)	5.20%	5.73%	6.20%
Long-term rate of return on plan assets (in hundredths)	7.25%	8.00%	8.50%
Forecast for future capital markets, period, range lower limit (in years)	5
Forecast for future capital markets, period, range upper limit (in years)	7
Expected benefit payments under defined benefit pension plans and postretirement benefit plan for next five years [Abstract]
2012	20,062
2013	20,160
2014	20,794
2015	21,399
2016	21,378
2017-2021	113,603
Projected benefit obligation	346,155	333,512	306,220
Fair value of plan assets	265,075	270,145	250,378
Postretirement [Member]
Components of net periodic cost [Abstract]
Service cost	685	609	627
Interest cost	1,764	1,795	1,903
Amortization of actuarial loss	67	0	12
Net periodic benefit cost	2,516	2,404	2,542
Assumptions used to determine net periodic benefit cost of pension plan and postretirement plan [Abstract]
Weighted average discount rate (in hundredths)	5.27%	5.75%	6.02%
Health care cost trend rate assumed for next year (in hundredths)	7.50%	8.00%	8.50%
Rate to which the cost trend rate is assumed to decline (ultimate trend rate) (in hundredths)	5.00%	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2020	2016	2016
Effect of one percentage point increase in health care cost trend rate on accumulated postretirement benefit obligation and aggregate of benefits earned and interest cost (in hundredths)	3.00%
Expected benefit payments under defined benefit pension plans and postretirement benefit plan for next five years [Abstract]
2012	2,386
2013	2,137
2014	2,189
2015	2,192
2016	2,199
2017-2021	10,567
Projected benefit obligation	$ 35,196	$ 34,492	$ 30,873