Maximum Potential Amount of Future Fundings as the Primary Obligor for Guarantees and the Liability for Expected Future Fundings (Detail) (Primary Obligor, USD $) In Millions	Sep. 09, 2011
Loss Contingencies [Line Items]
Maximum Potential Amount of Future Fundings	$ 265
Liability for Expected Future Fundings	64
Guarantee, Operating Profit
Loss Contingencies [Line Items]
Maximum Potential Amount of Future Fundings	147
Liability for Expected Future Fundings	56
Guarantee, Indebtedness of Others
Loss Contingencies [Line Items]
Maximum Potential Amount of Future Fundings	69
Liability for Expected Future Fundings	6
Guarantee, Other
Loss Contingencies [Line Items]
Maximum Potential Amount of Future Fundings	49
Liability for Expected Future Fundings	$ 2