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Financial Instrument - Risk Management and Fair Value - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2017
USD ($)
DerivativeInstrument
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Mar. 09, 2016
Disclosure of detailed information about financial instruments [line items]          
Derivative instrument hedging description   Short to mid-term hedging (generally three to eighteen months)      
Mark to market derivative income (expense)   $ 2.8 $ 111.6 $ (11.6)  
Fair value of derivative contracts   0.0 $ 2.8    
Foreign exchange gain (loss)   $ 11.0      
Bottom of range [member]          
Disclosure of detailed information about financial instruments [line items]          
Derivative instrument hedging term   3 months      
Top of range [member]          
Disclosure of detailed information about financial instruments [line items]          
Derivative instrument hedging term   18 months      
Interest rate swap contract [member]          
Disclosure of detailed information about financial instruments [line items]          
Number of derivative instrument company entered | DerivativeInstrument   1      
Description of impact of hypothetical interest rates on the variable-rate debt and marketable securities   If interest rates average 10% less in 2018 than in 2017, the interest income from marketable securities would decrease by approximately $1.4 million and the fair value of the debt would increase by approximately $1.3 million.      
Average interest rate on derivatives   10.00%      
Change in interest expense   $ 1.4      
Increase decrease in fair value of debt   $ 1.3      
Brazil, Brazil real [member]          
Disclosure of detailed information about financial instruments [line items]          
Percentage of foreign currency risk revenue   16.50% 10.10%    
Colombia, pesos [member]          
Disclosure of detailed information about financial instruments [line items]          
Percentage of foreign currency risk revenue   11.40% 11.80%    
Argentina, pesos [member]          
Disclosure of detailed information about financial instruments [line items]          
Percentage of foreign currency risk revenue   7.80% 6.80%    
Currency risk [member]          
Disclosure of detailed information about financial instruments [line items]          
Percentage of foreign exchange risk revenue   43.70%      
Percentage of foreign exchange risk expenses   59.80%      
Currency risk [member] | Sistema Complementario de Administracion de divisas [member]          
Disclosure of detailed information about financial instruments [line items]          
Percentage of foreign exchange rate 13.50     13.50  
Currency risk [member] | Sistema Complementario de Administracion de divisas [member] | Aeronautical operations [member]          
Disclosure of detailed information about financial instruments [line items]          
Percentage of foreign exchange rate         13.50
Currency risk [member] | Sistema Marginal de Divisas [member]          
Disclosure of detailed information about financial instruments [line items]          
Percentage of foreign exchange rate 198.7     198.7  
Currency risk [member] | DICOM [member]          
Disclosure of detailed information about financial instruments [line items]          
Percentage of foreign exchange rate   3,345.0 673.7    
Currency risk [member] | Venezuela [member]          
Disclosure of detailed information about financial instruments [line items]          
Foreign exchange gain (loss) $ 430.2        
Fuel derivative instruments [member]          
Disclosure of detailed information about financial instruments [line items]          
Derivative instrument hypothetical increases percentage   10.00%      
Fuel derivative instruments [member] | 2018 projection [member]          
Disclosure of detailed information about financial instruments [line items]          
Derivative instrument expense increase   $ 60.9      
Borrowing due through 2025 [member] | Fixed interest rate [member] | Bottom of range [member]          
Disclosure of detailed information about financial instruments [line items]          
Fixed interest rates   1.81% 1.81%    
Borrowing due through 2025 [member] | Fixed interest rate [member] | Top of range [member]          
Disclosure of detailed information about financial instruments [line items]          
Fixed interest rates   5.58% 5.58%