Pension and Other Postretirement Benefits (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 29, 2013	Sep. 23, 2012	Mar. 25, 2012	Sep. 29, 2013	Sep. 23, 2012
Net periodic benefit cost/(income)
Estimated future contributions to pension plans based on contractual obligations for the remaining fiscal year	$ 75,000,000			$ 75,000,000
Pension withdrawal expense	6,171,000	0		6,171,000	0
Pension Plans, Defined Benefit [Member]
Net periodic benefit cost/(income)
Service cost	2,579,000	3,271,000		7,736,000	9,925,000
Interest cost	21,927,000	26,714,000		65,787,000	80,198,000
Expected return on plan assets	(31,063,000)	(29,614,000)		(93,188,000)	(88,805,000)
Amortization of prior service (credit)/cost	(486,000)	201,000		(1,459,000)	603,000
Recognized actuarial loss	9,754,000	8,351,000		29,262,000	25,048,000
Net periodic benefit cost/(income)	2,711,000	8,923,000		8,138,000	26,969,000
Qualified Plans [Member]
Net periodic benefit cost/(income)
Service cost	2,323,000	2,894,000		6,968,000	8,794,000
Interest cost	19,284,000	23,592,000		57,858,000	70,832,000
Expected return on plan assets	(31,063,000)	(29,614,000)		(93,188,000)	(88,805,000)
Amortization of prior service (credit)/cost	(486,000)	201,000		(1,459,000)	603,000
Recognized actuarial loss	8,442,000	7,229,000		25,327,000	21,681,000
Net periodic benefit cost/(income)	(1,500,000)	4,302,000		(4,494,000)	13,105,000
Contributions to certain qualified pension plans				71,000,000
Non-Qualified Plans [Member]
Net periodic benefit cost/(income)
Service cost	256,000	377,000		768,000	1,131,000
Interest cost	2,643,000	3,122,000		7,929,000	9,366,000
Expected return on plan assets	0	0		0	0
Amortization of prior service (credit)/cost	0	0		0	0
Recognized actuarial loss	1,312,000	1,122,000		3,935,000	3,367,000
Net periodic benefit cost/(income)	4,211,000	4,621,000		12,632,000	13,864,000
Contributions to The New York Times Newspaper Guild Pension Plan[Member]
Net periodic benefit cost/(income)
Contributions to certain qualified pension plans				65,000,000
Minimum funding requirements				28,000,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Net periodic benefit cost/(income)
Service cost	285,000	239,000		855,000	717,000
Interest cost	1,009,000	1,246,000		3,027,000	3,738,000
Amortization of prior service (credit)/cost	(3,693,000)	(3,778,000)		(11,078,000)	(11,334,000)
Recognized actuarial loss	1,022,000	832,000		3,066,000	2,496,000
Net periodic benefit cost/(income)	(1,377,000)	(1,461,000)		(4,130,000)	(4,383,000)
Curtailment gain			$ 27,200,000