Shareholder's Equity (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016	Apr. 06, 2017
Equity, Class of Treasury Stock [Line Items]
Purchases of treasury stock (in dollars)			$ 305,000,000	$ 2,110,000,000
Dividends declared per share (in dollars per share)	$ 0.40	$ 0.35	$ 1.15	$ 1
CARNIVAL PLC
Equity, Class of Treasury Stock [Line Items]
Dividends declared per share (in dollars per share)	$ 0.40
Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Shares authorized to be repurchased (in dollars)					$ 1,000,000,000.0
Remaining number of shares available under the repurchase program (in shares)	$ 830,000,000		$ 830,000,000
Repurchase Program | CARNIVAL PLC
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)			2.8
Purchases of treasury stock (in dollars)			$ 156,000,000
Repurchase Program | Carnival Corp
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)			2.4
Purchases of treasury stock (in dollars)			$ 158,000,000