Debt - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 29, 2013
Debt Instrument [Line Items]
Loan period	5 years
Total unsecured loan under credit facility	$ 2,800,000,000
Interest rate of borrowing under credit facility	2.20%
2013	230,000,000
2014	230,000,000
2015	230,000,000
2016	230,000,000
Remaining balance term loan facility there after	1,300,000,000
Remaining outstanding balance term loan facility	2,000,000,000
Maturity date of remaining term loan facility	Mar. 08, 2017
Available future borrowings on revolving credit facility	500,000,000
Term loan facility [Member]
Debt Instrument [Line Items]
Total unsecured loan under credit facility	2,300,000,000
Line of credit facility additional borrowing capacity	500,000,000
Revolving credit facility [Member]
Debt Instrument [Line Items]
Credit facility revolving loan	$ 500,000,000