Shareholder's Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 23, 2016	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2016	Aug. 31, 2015	Nov. 30, 2015	Jun. 27, 2016
Equity, Class of Treasury Stock [Line Items]
Purchases of treasury stock				$ 2,110	$ 166
Sales of treasury stock				$ 40	$ 167
Dividends Declared Per Share (in dollars per share)		$ 0.35	$ 0.30	$ 1.00	$ 0.80
Common Stock
Equity, Class of Treasury Stock [Line Items]
Increase in dividend rate (as a percent)				17.00%
Dividends Declared Per Share (in dollars per share)				$ 0.35		$ 0.30
Ordinary Shares
Equity, Class of Treasury Stock [Line Items]
Increase in dividend rate (as a percent)				17.00%
Dividends Declared Per Share (in dollars per share)				$ 0.35		$ 0.30
Carnival Corp
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)				43,600
Purchases of treasury stock				$ 2,100
Stock Repurchase Program, Authorized Amount, Increase							$ 1,000
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 | Carnival Corp
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)	2,300
Purchases of treasury stock	$ 107
Remaining number of shares available under the Repurchase Program (in shares)	$ 500