Pension and Other Postretirement Benefits (Details) (USD $)		3 Months Ended
	Dec. 30, 2012	Mar. 31, 2013 Pension Plans, Defined Benefit [Member]	Mar. 25, 2012 Pension Plans, Defined Benefit [Member]	Mar. 31, 2013 Qualified Plans [Member]	Mar. 25, 2012 Qualified Plans [Member]	Mar. 31, 2013 Non-Qualified Plans [Member]	Mar. 25, 2012 Non-Qualified Plans [Member]	Mar. 31, 2013 Contributions to The New York Times Newspaper Guild Pension Plan[Member]	Mar. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member]	Mar. 25, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]
Net periodic benefit cost/(income)
Service cost		$ 2,579,000	$ 3,384,000	$ 2,323,000	$ 3,007,000	$ 256,000	$ 377,000		$ 285,000	$ 239,000
Interest cost		22,435,000	27,352,000	19,756,000	24,187,000	2,679,000	3,165,000		1,009,000	1,246,000
Expected return on plan assets		(31,063,000)	(29,577,000)	(31,063,000)	(29,577,000)	0	0
Amortization of prior service (credit)/cost		(486,000)	201,000	(486,000)	201,000	0	0		(3,693,000)	(3,778,000)
Recognized actuarial loss		10,041,000	8,628,000	8,701,000	7,466,000	1,340,000	1,162,000		1,022,000	832,000
Curtailment gain									0	(27,213,000)
Net periodic benefit cost/(income)		3,506,000	9,988,000	(769,000)	5,284,000	4,275,000	4,704,000		(1,377,000)	(28,674,000)
Contributions to certain qualified pension plans				61,000,000				60,000,000
Minimum funding requirements								23,000,000
Estimated future contributions to pension plans based on contractual obligations for the remaining fiscal year	$ 75,000,000