Commitments and Contingencies - Additional Information (Detail) $ in Millions	Dec. 31, 2015 USD ($)
Other Commitments [Line Items]
Guarantees of subsidiaries	$ 150
Outstanding purchase orders	3,200
Future Minimum Sublease Rentals, Operating Leases, Due Total	11
Minimum
Other Commitments [Line Items]
Future Minimum Sublease Rentals, Operating Leases, Due Per Year	1
Maximum
Other Commitments [Line Items]
Future Minimum Sublease Rentals, Operating Leases, Due Per Year	$ 5