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Shareholders' Equity - Additional Information (Detail) (USD $)
 1 Months Ended 12 Months Ended
Sep. 30, 2007
Nov. 30, 2011
Nov. 30, 2010
Nov. 30, 2009
Stockholders Equity Note [Line Items]        
Share repurchase program, aggregate value authorized for repurchase $ 1,000,000,000      
Share repurchased, Value   454,000,000 524,000,000 188,000,000
Stock repurchase program, remaining authorized amount   334,000,000    
Sales of treasury stock     545,000,000 196,000,000
Carnival Corp
        
Stockholders Equity Note [Line Items]        
Preferred stock, authorized   40,000,000 40,000,000  
Repurchase of Common Stock (in shares)   13,500,000 14,800,000 5,800,000
Share repurchased, Value   413,000,000    
Share repurchase program additional authorized shares for repurchase   31,500,000    
Treasury Stock Sold (in shares)       450,000
Sales of treasury stock       9,000,000
Common stock reserved for issuance pursuant to convertible notes, employee benefit and dividend reinvestment plans   28,300,000    
CARNIVAL PLC
        
Stockholders Equity Note [Line Items]        
Repurchase of Common Stock (in shares)   1,300,000   450,000
Share repurchased, Value   41,000,000    
Share repurchase program additional authorized shares for repurchase   19,200,000    
Treasury Stock Sold (in shares)     14,800,000 5,800,000
Sales of treasury stock     $ 545,000,000 $ 187,000,000
Common stock reserved for issuance pursuant to employee benefit plans   17,800,000