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Debt Obligations and Commitments - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 21, 2015	Mar. 22, 2014
Debt Obligations and Commitments [Abstract]
Repayments of Long-term Debt	$ 2,052,000,000us-gaap_RepaymentsOfLongTermDebt	$ 1,652,000,000us-gaap_RepaymentsOfLongTermDebt
Commercial Paper	$ 4,400,000,000us-gaap_CommercialPaper

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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