Shareholder's Equity (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended			6 Months Ended
	May 31, 2018	Feb. 28, 2018	May 31, 2017	May 31, 2018	May 31, 2017	Apr. 10, 2018
Equity, Class of Treasury Stock [Line Items]
Shares repurchase program, aggregate value authorized for repurchase						$ 1,000,000,000.0
Purchases of treasury stock (in dollars)				$ 513,000,000	$ 152,000,000
Dividends declared per share (in dollars per share)	$ 0.5	$ 0.45	$ 0.4	$ 0.95	$ 0.75
Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Remaining authorized repurchase amount	$ 827,000,000			$ 827,000,000
Repurchase Program | CARNIVAL PLC
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)	4.7
Purchases of treasury stock (in dollars)	$ 312,000,000
Repurchase Program | Carnival Corp
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)	3.1
Purchases of treasury stock (in dollars)	$ 201,000,000