Notes Payable and Long-Term Debt (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Mar. 23, 2013	Dec. 29, 2012
Terminated
Debt Instrument [Line Items]
Capital lease obligations	50
8.75% debentures due 2013
Debt Instrument [Line Items]
Interest rate of debt	8.75%	8.75%
Secured debt, 13.875% notes due 2014
Debt Instrument [Line Items]
Interest rate of debt	13.875%	13.875%
Secured debt, 8% notes due 2016
Debt Instrument [Line Items]
Interest rate of debt	8.00%	8.00%
Contracts And Notes
Debt Instrument [Line Items]
Weighted average interest rate of debt	3.30%	3.30%
Capital Lease Obligations
Debt Instrument [Line Items]
Weighted average interest rate of debt	2.30%	2.70%
Notes payable
Debt Instrument [Line Items]
Weighted average interest rate of debt	1.00%	1.30%