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Shareholder's Equity (Details) - USD ($) shares in Thousands, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Mar. 25, 2016 | Feb. 29, 2016 | Feb. 28, 2015
Equity, Class of Treasury Stock [Line Items] |  |  |
Purchases of treasury stock |  | $ 916 | $ 0
Sales of treasury stock |  | $ 40 | $ 0
Carnival Corp |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased (in shares) |  | 18,400 |
Purchases of treasury stock |  | $ 877 |
Carnival Corp |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased (in shares) |  | 891 |
Treasury stock sold (in shares) |  | 891 |
Sales of treasury stock |  | $ 40 |
Subsequent Event |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Remaining number of shares available under the Repurchase Program (in shares) | $ 698 |  |
Subsequent Event | Carnival Corp |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased (in shares) | 2,600 |  |
Purchases of treasury stock | $ 124 |  |

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