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Commitments and Contingencies - Additional Information (Detail)
$ in Millions
 3 Months Ended
Sep. 30, 2016
USD ($)
Container
Trailer
Tractor
Jun. 30, 2016
USD ($)
Container
Commitments And Contingencies Disclosure [Abstract]    
Purchase contract units, containers | Container   4,500
Cost of purchasing containers | $   $ 43
Number of containers received | Container 3,066  
Purchase contract units trailers | Trailer 100  
Purchase contract units tractors | Tractor 50  
Cost of purchasing equipment | $ $ 9