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Shareholders' Equity - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 2 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2007 | Nov. 30, 2012 | Nov. 30, 2011 | Nov. 30, 2010 | Nov. 30, 2012 Carnival Corp | Nov. 30, 2011 Carnival Corp | Nov. 30, 2010 Carnival Corp | Nov. 15, 2012 Carnival Corp | Nov. 30, 2011 CARNIVAL PLC | Nov. 30, 2010 CARNIVAL PLC | Nov. 30, 2012 CARNIVAL PLC | Jan. 16, 2013 Subsequent Event Carnival Corp | Jan. 22, 2013 Subsequent Event Carnival Corp | Jan. 22, 2013 Subsequent Event CARNIVAL PLC
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, authorized |  |  |  |  | 40 | 40 |  |  |  |  |  |  |  |
Share repurchase program, aggregate value authorized for repurchase | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of Common Stock (in shares) |  |  |  |  | 2.6 | 13.5 | 14.8 |  | 1.3 |  |  | 2.1 |  |
Share repurchased, Value |  | 90,000,000 | 454,000,000 | 524,000,000 | 90,000,000 | 413,000,000 |  |  | 41,000,000 |  |  | 78,000,000 |  |
Stock repurchase program, remaining authorized amount |  | 244,000,000 |  |  |  |  |  |  |  |  |  | 1,000,000,000 |  |
Share repurchase program additional authorized shares for repurchase |  |  |  |  | 32.8 |  |  |  |  |  | 19.2 |  |  |
Stock repurchase program, remaining authorized shares |  |  |  |  |  |  |  |  |  |  |  |  | 32.8 | 18.1
Treasury Stock Sold (in shares) |  |  |  |  |  |  |  |  |  | 14.8 |  |  |  |
Sales of treasury stock |  |  |  | 545,000,000 |  |  |  |  |  | 545,000,000 |  |  |  |
Common stock reserved for issuance pursuant to convertible notes, employee benefit and dividend reinvestment plans |  |  |  |  | 25 |  |  |  |  |  |  |  |  |
Common stock reserved for issuance pursuant to employee benefit plans |  |  |  |  |  |  |  |  |  |  | 18.8 |  |  |
Dividends payable |  | $ 583,000,000 | $ 194,000,000 |  |  |  |  | $ 400,000,000 |  |  |  |  |  |
Dividends payable, per share |  |  |  |  |  |  |  | $ 0.50 |  |  |  |  |  |
Dividend payment, date |  |  |  |  |  |  |  | 2012-12 |  |  |  |  |  |
2012 quarterly dividend per share |  |  |  |  | $ 0.25 |  |  |  |  |  |  |  |  |

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