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Shareholders' Equity - Additional Information (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Nov. 30, 2018 | Nov. 30, 2017 | Nov. 30, 2016 | Apr. 06, 2017
Stockholders Equity Note [Line Items] |  |  |  |
Share repurchase program, aggregate value authorized for repurchase |  |  |  | $ 1,000,000,000.0
Repurchases under the Stock Swap Programs | $ 1,468,000,000 | $ 552,000,000 | $ 2,340,000,000 |
Unrecognized pension expenses reclassified out of accumulated other comprehensive (loss) income | $ 5,000,000 | 18,000,000 | $ 7,000,000 |
Preferred stock, authorized (in shares) | 40,000,000 |  |  |
Carnival Corp |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Stock issued during period, shares, treasury stock reissued (in shares) |  |  | 900,000 |
Net proceeds from sale of treasury stock |  |  | $ 40,000,000 |
Shares repurchased (in shares) |  |  | 900,000 |
Sales under the Stock Swap Programs | $ 0 | $ 0 | $ 0 |
Preferred stock, shares issued (in shares) | 0 | 0 |  |
Carnival PLC |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Repurchases under the Stock Swap Programs | $ 0 | $ 0 | $ 0 |
Preferred stock, shares issued (in shares) | 0 | 0 |  |
Repurchase Agreements | Carnival Corp |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Shares repurchased (in shares) | 7,800,000 | 3,300,000 | 47,800,000 |
Repurchases under the Stock Swap Programs | $ 476,000,000 | $ 223,000,000 | $ 2,264,000,000 |
Repurchase Agreements | Carnival PLC |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Shares repurchased (in shares) | 16,300,000 | 5,600,000 | 700,000 |
Repurchases under the Stock Swap Programs | $ 985,000,000 | $ 335,000,000 | $ 35,000,000 |

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