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Revenue and Expense Recognition (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2019
Aug. 31, 2018
Dec. 01, 2018
Disaggregation of Revenue [Line Items]          
Fees, taxes, and charges $ 186 $ 174 $ 503 $ 465  
Contract assets 147   147   $ 151
Cruise          
Disaggregation of Revenue [Line Items]          
Customer deposits $ 4,900   4,900   $ 4,700
Revenues recognized related to customer deposits at beginning of period     $ 4,100