Debt Obligations and Commitments - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 23, 2013
Debt Instrument [Line Items]
Commercial paper outstanding	$ 1,500,000,000
Notes Due 2016 | Floating Rate Notes Due 2016
Debt Instrument [Line Items]
Fixed and floating rate notes issued	625,000,000
LIBOR term	3 months
Basis spread on LIBOR	0.21%
Notes Due 2016 | 0.700% Senior Notes Due 2016
Debt Instrument [Line Items]
Fixed and floating rate notes issued	625,000,000
Interest rate on debt	0.70%
Notes Due 2023 | 2.75000% Senior Notes Due 2023
Debt Instrument [Line Items]
Fixed and floating rate notes issued	$ 1,250,000,000
Interest rate on debt	2.75%