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Property, Equipment and Technology, Net (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Sep. 30, 2012
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology $ 3,439 $ 3,081
Accumulated depreciation and amortization (1,707) (1,447)
Property, equipment and technology, net 1,732 1,634
Land
   
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology 71 71
Buildings and building improvements
   
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology 766 751
Furniture, equipment and leasehold improvements
   
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology 983 837
Construction-in-progress
   
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology 74 69
Technology
   
Property, Plant and Equipment [Line Items]    
Total property, equipment and technology $ 1,545 $ 1,353