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