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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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 total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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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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Tax effect of curtailment of a plan resulting from a plan amendment that occurred during the period. The benefit has not been recognized in net periodic benefit cost.

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The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

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Pension and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended			6 Months Ended
	Mar. 25, 2012	Dec. 25, 2011	Jun. 24, 2012 Pension Plans, Defined Benefit [Member]	Jun. 26, 2011 Pension Plans, Defined Benefit [Member]	Jun. 24, 2012 Pension Plans, Defined Benefit [Member]	Jun. 26, 2011 Pension Plans, Defined Benefit [Member]	Jun. 24, 2012 Qualified Plans [Member]	Jun. 26, 2011 Qualified Plans [Member]	Jun. 24, 2012 Qualified Plans [Member]	Jun. 26, 2011 Qualified Plans [Member]	Jun. 24, 2012 Non-Qualified Plans [Member]	Jun. 26, 2011 Non-Qualified Plans [Member]	Jun. 24, 2012 Non-Qualified Plans [Member]	Jun. 26, 2011 Non-Qualified Plans [Member]	Jun. 24, 2012 Contributions to New York Times Newspaper Guild Pension Plan[Member]	Jun. 24, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Mar. 25, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 26, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 24, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 26, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Effect of remeasurement and curtailment	$ 3,000
Net periodic benefit cost/(income)
Service cost			3,271	3,396	6,655	6,792	2,894	3,019	5,901	6,038	377	377	754	754		239		290	478	580
Interest cost			27,295	28,284	54,647	56,568	24,130	24,998	48,317	49,996	3,165	3,286	6,330	6,572		1,246		1,825	2,492	3,650
Expected return on plan assets			(29,614)	(27,953)	(59,191)	(55,906)	(29,614)	(27,953)	(59,191)	(55,906)	0	0	0	0
Amortization of prior service cost/(credit)			201	201	402	402	201	201	402	402	0	0	0	0		(3,778)		(3,901)	(7,556)	(7,802)
Recognized actuarial loss			8,633	7,249	17,261	14,498	7,471	6,445	14,937	12,890	1,162	804	2,324	1,608		832		481	1,664	962
Curtailment gain																0	27,213	0	(27,213)	0
Net periodic benefit cost/(income)			9,786	11,177	19,774	22,354	5,082	6,710	10,366	13,420	4,704	4,467	9,408	8,934		(1,461)		(1,305)	(30,135)	(2,610)
Estimated future contributions to pension plans based on contractual obligations for next fiscal year		47,000
Contributions to certain qualified pension plans															$ 24,000