XML 39 R29.htm IDEA: XBRL DOCUMENT v3.4.0.3
Commitments and Contingencies - Additional Information (Detail)
$ in Millions
 1 Months Ended
Feb. 29, 2016
USD ($)
Container
Dec. 31, 2015
Container
Mar. 31, 2016
Container
Commitments And Contingencies Disclosure [Abstract]      
Purchase contract units, containers 500 1,000  
Cost of purchasing containers | $ $ 14    
Number of containers received     1,216