Long-Term Debt (Parenthetical) (Detail)	Mar. 25, 2012	Dec. 25, 2011
Unsecured notes bearing fixed rate interest at 6.375% due April 2012
Debt Disclosure [Line Items]
Long-term debt, interest rate	6.375%	6.375%
Unsecured notes bearing fixed rate interest at 8.75% due November 2014
Debt Disclosure [Line Items]
Long-term debt, interest rate	8.75%	8.75%
Unsecured notes bearing fixed rate interest at 10% due June 2015
Debt Disclosure [Line Items]
Long-term debt, interest rate	10.00%	10.00%
Unsecured notes bearing fixed rate interest at 6.375% due September 2015
Debt Disclosure [Line Items]
Long-term debt, interest rate	6.375%	6.375%
Unsecured notes bearing fixed rate interest at 10% due April 2016
Debt Disclosure [Line Items]
Long-term debt, interest rate	10.00%	10.00%
Unsecured notes bearing fixed rate interest at 9.375% due November 2017
Debt Disclosure [Line Items]
Long-term debt, interest rate	9.375%	9.375%
Unsecured notes bearing fixed rate interest at 7.125% due September 2018
Debt Disclosure [Line Items]
Long-term debt, interest rate	7.125%	7.125%