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Shareholder's Equity (Details) - USD ($) shares in Millions, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Mar. 24, 2017 | Feb. 28, 2017 | Feb. 29, 2016
Equity, Class of Treasury Stock [Line Items] |  |  |
Purchases of treasury stock |  | $ 69 | $ 916
Carnival Corp |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased (in shares) |  | 1.4 |
Purchases of treasury stock |  | $ 75 |
Subsequent Event | Carnival Corp |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares repurchased (in shares) | 0.8 |  |
Purchases of treasury stock | $ 44 |  |
Remaining number of shares available under the Repurchase Program (in shares) | $ 280 |  |

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