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Other Assets (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2019 USD ($) cruise_ship | Feb. 28, 2021 USD ($) | Feb. 29, 2020 USD ($) | Nov. 30, 2020 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |
Impairment charge |  | $ 17 | $ 1,062 |
White Pass And Yukon Route |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Impairment charge |  | 17 |  |
Investment, amount |  | 76 |  | $ 94
Investment equity |  | 57 |  | 75
Investment loan |  | 19 |  | 19
CSSC-Carnival |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Investment, amount |  | 139 |  | 140
EA Segment | CSSC-Carnival |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Investment, amount |  | $ 283 |  | $ 283
Number of cruise ships | cruise_ship | 2 |  |  |
Investment amount sold, gain | $ 107 |  |  |

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