Other Postretirement Benefits - Schedule of Components of Net Periodic Postretirement Benefit Income (Details) (Other Postretirement Benefit Plans, Defined Benefit [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 25, 2012	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost		$ 1,089	$ 957	$ 1,143
Interest cost		4,101	4,985	6,891
Recognized actuarial loss		4,440	3,328	2,289
Amortization of prior service credit		(13,051)	(15,112)	(16,593)
Effect of curtailment	(27,200)	(49,122)	(27,213)	0
Net periodic postretirement benefit income		$ (52,543)	$ (33,055)	$ (6,270)