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Shareholder's Equity (Details) - USD ($) $ / shares in Units, shares in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Aug. 31, 2017 | Aug. 31, 2016 | Aug. 31, 2017 | Aug. 31, 2016 | Apr. 06, 2017
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Purchases of treasury stock (in dollars) |  |  | $ 305,000,000 | $ 2,110,000,000 |
Dividends declared per share (in dollars per share) | $ 0.40 | $ 0.35 | $ 1.15 | $ 1 |
CARNIVAL PLC |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Dividends declared per share (in dollars per share) | $ 0.40 |  |  |  |
Repurchase Program |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Shares authorized to be repurchased (in dollars) |  |  |  |  | $ 1,000,000,000.0
Remaining number of shares available under the repurchase program (in shares) | $ 830,000,000 |  | $ 830,000,000 |  |
Repurchase Program | CARNIVAL PLC |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Shares repurchased (in shares) |  |  | 2.8 |  |
Purchases of treasury stock (in dollars) |  |  | $ 156,000,000 |  |
Repurchase Program | Carnival Corp |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Shares repurchased (in shares) |  |  | 2.4 |  |
Purchases of treasury stock (in dollars) |  |  | $ 158,000,000 |  |

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