XML 22 R12.htm IDEA: XBRL DOCUMENT v3.10.0.1
Property and Equipment, net
9 Months Ended
Sep. 30, 2018
Property, Plant and Equipment [Abstract]  
Property and Equipment, net
5. Property and Equipment, net

 

Property and equipment, net increased $1.0 billion for the nine months ended September 30, 2018, primarily due to the delivery of Norwegian Bliss and ship improvement projects.