Long-Term Debt - Additional Information (Detail) (USD $)	3 Months Ended				3 Months Ended
	Mar. 25, 2012	Mar. 25, 2012 Revolving Credit Facility	Mar. 25, 2012 Revolving Credit Facility Unsecured Debt Minimum	Apr. 30, 2012 Repayment of Debt Revolving Credit Facility	Mar. 25, 2012 Unsecured notes bearing fixed rate interest at 6.375% due April 2012	Dec. 25, 2011 Unsecured notes bearing fixed rate interest at 6.375% due April 2012
Debt Instrument [Line Items]
Reduction in long-term debt reflecting repayments of borrowings, net of discount amortization	$ 95,000,000
Revolving credit agreements, repayments	97,000,000
Line of credit facility, unused borrowing capacity		1,000,000,000		638,000,000
Line of credit facility, additional unsecured debt borrowing capacity			$ 1,000,000,000
Long-term debt, interest rate					6.375%	6.375%
Long-term debt, maturity date					2012-04