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Self-Insurance Reserve for Losses and Loss Adjustment Expenses - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Other Liabilities [Line Items]
Decrease in provision for unpaid loss and loss adjustment expenses	$ 9	$ 8
Self-insurance reserve	330	313	304
Self-insurance reserve, current portion	99	98
Self-insurance reserve, long-term portion	$ 231	$ 215

The estimated cost of settling claims under the terms of the underlying insurance policies and assumed and ceded insurance contracts as of the balance sheet date, including an estimate for claims which have been incurred but not reported and the actual and estimated costs of settling claims.

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