Retirement And Benefit Plans (Changes In Pension And Other Postretirement Benefit Obligations And Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	$ 5,662	$ 5,357
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	1,297,655	1,260,676
Service cost	2,546	3,164	4,506
Interest cost	70,176	74,213	75,858
Actuarial loss	94,656	59,494
Changes due to exchange rates
Benefits paid	(99,752)	(99,892)
Benefit obligation at end of year	1,365,281	1,297,655	1,260,676
Fair value of plan assets at beginning of year	1,117,413	1,050,514
Actual return on plan assets	14,746	163,342
Employer contributions	3,324	3,449
Fair value of plan assets at end of year	1,035,731	1,117,413	1,050,514
Funded status recognized	(329,550)	(180,242)
Other Defined Benefits Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	24,021	20,337
Service cost	227	263	184
Interest cost	1,006	1,213	1,137
Actuarial loss	(1,334)	2,634
Changes due to exchange rates	(346)	792
Benefits paid	(1,322)	(1,218)
Benefit obligation at end of year	22,252	24,021	20,337
Fair value of plan assets at beginning of year
Actual return on plan assets
Employer contributions	1,322	1,218
Fair value of plan assets at end of year
Funded status recognized	$ (22,252)	$ (24,021)

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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The net increase or decrease of changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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The increase in the fair value of plan assets from contributions made by the employer.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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The amount of increase or decrease in the benefit obligation attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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