Debt Obligations - Debt Information (Details) (USD $) Share data in Millions, unless otherwise specified	1 Months Ended		3 Months Ended								12 Months Ended				0 Months Ended		1 Months Ended		0 Months Ended	3 Months Ended				1 Months Ended
	Nov. 30, 2012	Mar. 31, 2009	Dec. 25, 2011		Sep. 25, 2011		Jun. 26, 2011		Mar. 27, 2011		Dec. 30, 2012	Dec. 25, 2011		Dec. 26, 2010	Sep. 26, 2012 Notes Due 2012 [Member]	Dec. 30, 2012 Notes Due 2012 [Member]	Dec. 30, 2012 Notes Due 2015 [Member]	Mar. 31, 2005 Notes Due 2015 [Member]	Aug. 15, 2011 Notes Due 2015 Called 2011 [Member]	Sep. 25, 2011 Notes Due 2015 Called 2011 [Member]	Jan. 31, 2009 Notes Due 2015 Called 2011 [Member]	Dec. 30, 2012 Notes Due 2016 [Member]	Nov. 30, 2010 Notes Due 2016 [Member]	Mar. 31, 2009 Option To Repurchase Headquarters Building 2019 [Member]	Jan. 31, 2009 Carlos Slim Helu [Member]
Debt Information
Debt repaid															$ 75,000,000					$ 250,000,000
Interest rate on debt															4.61%	4.61%	5.00%	5.00%			14.053%	6.625%	6.625%
Debt instrument, face amount																		250,000,000			250,000,000		225,000,000	225,000,000
Redemption of long-term debt											0	250,000,000		0			5,900,000		280,000,000
Percentage of principle available for debt redemption																		100.00%					100.00%
Premium (charge) on debt redemption	(1,400,000)		0	[1]	(46,381,000)	[1]	0	[1]	0	[1]	0	(46,381,000)	[1]	0			(400,000)			(46,400,000)
Warrants issued In connection with debt issuance																					15.9
Class of warrant or right, exercise price of warrants or rights (USD per warrant)																					6.3572
Class A common stock ownership percentage																									8.00%
Accrued and unpaid interest for prepayment of 14.053% Notes																			3,000,000
Make-whole premium amount for redemption of 14.053% Notes																			27,000,000
Sale leaseback financing, lease term		15 years
Sale leaseback financing, lease renewal term		20 years
Sale leaseback purchase option price																								250,000,000
Proceeds from sale-leaseback financing																								211,000,000
Debt instrument, fee amount																								$ 39,000,000
Sale leaseback financing, amortization period		10 years
Debt instrument, interest rate, effective percentage																								13.00%

[1] In the third quarter of 2011, we recorded a $46.4 million charge in connection with the prepayment of all $250.0 million aggregate principal amount of the 14.053% Notes.