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Fair Value Measurements, Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended
May 31, 2011
May 31, 2010
May 31, 2011
May 31, 2010
Nov. 30, 2010
Jul. 31, 2010
Minimum
Jul. 31, 2010
Maximum
Jul. 31, 2010
Ibero Cruise
May 31, 2011
Foreign Exchange Contract
Cash Flow Hedging
May 31, 2010
Foreign Exchange Contract
Cash Flow Hedging
May 31, 2011
Foreign Exchange Contract
Cash Flow Hedging
May 31, 2010
Foreign Exchange Contract
Cash Flow Hedging
May 31, 2011
Foreign Exchange Contract
Net investment hedges
May 31, 2010
Foreign Exchange Contract
Net investment hedges
May 31, 2011
Foreign Exchange Contract
Net investment hedges
May 31, 2010
Foreign Exchange Contract
Net investment hedges
May 31, 2011
Euro And Sterling Debt And Other Obligations
Nov. 30, 2010
Euro And Sterling Debt And Other Obligations
Fair Value, Measurement Inputs, Disclosure [Line Items]                                    
Percentage of weighted average cost of capital adjusted for risk           10.00% 12.00%                      
Percentage by which Ibero's estimated fair value exceeds its carrying value               24.00%                    
Amount by which Ibero's estimated fair value exceeds its carrying value               $ 141                    
Goodwill 3,424   3,424   3,320     152                    
Effective portions of derivative gains and (losses) recognized in other comprehensive income (loss)                 45 (61) 82 (98) (5) 39 (24) 86    
Designated debt and other obligations as nonderivative hedges of net investments in foreign operations                                 3,100 3,000
Debt and other obligations maturity date Nov. 30, 2021
Cumulative foreign currency transaction (losses) and gains included in cumulative translation adjustment component of AOCI (36)   (36)   183                          
Foreign currency translation adjustment $ (110) $ 124 $ (220) $ 428                            
Newbuild passenger capacity under contract exposed to currency risk 42.00%   42.00%                              
Newbuild passenger capacity under contract not exposed to currency risk 58.00%   58.00%                              
Percentage of debt bore fixed interest rates, including the effect of interest rate swaps 66.00%   66.00%   69.00%                          
Percentage of debt bore floating interest rates, including the effect of interest rate swaps 34.00%   34.00%   31.00%