v2.4.0.6
Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Commitments and Contingencies Disclosure [Line Items]  
Other non-cancelable contractual obligations $ 1,900
Open purchase orders 2,800
Unused letters of credit 46
Building | New York City Property
 
Commitments and Contingencies Disclosure [Line Items]  
Future rental income related to leases assumed in connection with building purchases $ 726