Shareholder's Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Feb. 28, 2018	Feb. 28, 2017
Equity, Class of Treasury Stock [Line Items]
Purchases of treasury stock (in dollars)	$ 218	$ 69
Dividends declared per share (in dollars per share)	$ 0.45	$ 0.35
Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Remaining authorized repurchase amount	$ 370
Repurchase Program | CARNIVAL PLC
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)	3.0
Purchases of treasury stock (in dollars)	$ 204
Repurchase Program | Carnival Corp
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)	0.2
Purchases of treasury stock (in dollars)	$ 12