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Shareholder's Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 01, 2015 | Aug. 31, 2015 | Aug. 31, 2015 | Aug. 31, 2014 | Sep. 30, 2015 | May. 31, 2015
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Purchases of treasury stock |  |  | $ 166 | $ 0 |  |
Sales of treasury stock |  |  | $ 167 | $ 0 |  |
Dividend Increase, Percentage |  | 20.00% |  |  |  |
Dividends Payable, Amount Per Share |  | $ 0.30 | $ 0.30 |  |  | $ 0.25
Carnival Corp |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  | 78 |  |  |
Purchases of treasury stock |  |  | $ 4 |  |  |
Carnival Corp |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  | 3,200 |  |  |
Stock Issued During Period, Shares, Treasury Stock Reissued |  |  | 3,200 |  |  |
Sales of treasury stock |  |  | $ 167 |  |  |
Subsequent Event |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased | $ 970 |  |  |  |  |
Dividends Payable |  |  |  |  | $ 40 |
Subsequent Event | Carnival Corp |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |
Treasury Stock, Shares, Acquired | 20 |  |  |  |  |
Purchases of treasury stock | $ 1 |  |  |  |  |

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