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Shareholders' Equity - Additional Information (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2020 | Oct. 31, 2020 | Apr. 30, 2020 | Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2018
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Unrecognized pension expenses reclassified out of accumulated other comprehensive (loss) income |  |  |  | $ 3,000,000 | $ 5,000,000 | $ 5,000,000
Preferred stock, authorized (in shares) | 40,000,000 |  |  | 40,000,000 |  |
Public Offering |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Shares issued (in shares) |  |  | 71,900,000 |  |  |
Price per share (in dollars per share) |  |  | $ 8.00 |  |  |
Consideration received |  |  | $ 556,000,000 |  |  |
ATM Offering |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Shares issued (in shares) | 94,500,000 | 67,100,000 |  |  |  |
Stock value, authorized | $ 1,500,000,000 | $ 1,000,000,000.0 |  | $ 1,500,000,000 |  |
Carnival Corp |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Preferred stock, shares issued (in shares) | 0 |  |  | 0 | 0 |
Carnival PLC |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Preferred stock, shares issued (in shares) | 0 |  |  | 0 | 0 |

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