Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Debt (Institutional secured term & secured portfolio loans) (Details)

v3.8.0.1
Debt (Institutional secured term & secured portfolio loans) (Details)
1 Months Ended 12 Months Ended
Mar. 09, 2018
Dec. 31, 2017
USD ($)
aircraft
Feb. 28, 2018
Dec. 31, 2017
USD ($)
aircraft
Aug. 31, 2017
Feb. 28, 2017
Jan. 31, 2017
Dec. 31, 2016
USD ($)
Nov. 30, 2016
USD ($)
aircraft
Jul. 31, 2016
USD ($)
aircraft
Apr. 30, 2016
USD ($)
aircraft
Dec. 31, 2015
USD ($)
aircraft
Mar. 31, 2014
Apr. 30, 2013
USD ($)
Mar. 31, 2011
USD ($)
Dec. 31, 2017
USD ($)
aircraft
Dec. 31, 2016
USD ($)
Mar. 06, 2014
USD ($)
Feb. 29, 2012
USD ($)
Hyperion Facility [Member]                                      
Debt Instrument [Line Items]                                      
Credit facility maximum borrowing capacity                                   $ 1,500,000,000.0  
Number of aircraft designated as collateral | aircraft                               81      
Debt instrument, collateral amount   $ 2,230,000,000   $ 2,230,000,000                       $ 2,230,000,000      
Hyperion Facility [Member] | Scenario, Actual [Member]                                      
Debt Instrument [Line Items]                                      
Loan-to-value ratio                               67.00%      
Hyperion Facility [Member] | LIBOR [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate         2.00%   2.25%           2.75%            
Hyperion Facility [Member] | LIBOR [Member] | Subsequent Event [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate 1.75%                                    
Hyperion Facility [Member] | Maximum [Member]                                      
Debt Instrument [Line Items]                                      
Loan-to-value ratio                               70.00%      
Vancouver Facility [Member]                                      
Debt Instrument [Line Items]                                      
Credit facility maximum borrowing capacity                           $ 750,000,000.0         $ 900,000,000.0
Number of aircraft designated as collateral | aircraft   51                                  
Debt instrument, collateral amount   $ 1,310,000,000   1,310,000,000                       $ 1,310,000,000      
Prepayment of debt                           $ 150,000,000          
Vancouver Facility [Member] | Scenario, Actual [Member]                                      
Debt Instrument [Line Items]                                      
Loan-to-value ratio                               57.00%      
Vancouver Facility [Member] | LIBOR [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate         2.00%     2.25%           2.75%          
Vancouver Facility [Member] | LIBOR [Member] | Subsequent Event [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate     1.75%                                
Vancouver Facility [Member] | Maximum [Member]                                      
Debt Instrument [Line Items]                                      
Loan-to-value ratio                               63.00%      
Temescal Facility [Member]                                      
Debt Instrument [Line Items]                                      
Credit facility maximum borrowing capacity   1,500,000,000   1,500,000,000                     $ 1,300,000,000 $ 1,500,000,000      
Number of aircraft designated as collateral | aircraft                               50      
Debt instrument, collateral amount   1,590,000,000   1,590,000,000                       $ 1,590,000,000      
Credit facility amount outstanding   $ 773,700,000   773,700,000                       $ 773,700,000      
Temescal Facility [Member] | Scenario, Actual [Member]                                      
Debt Instrument [Line Items]                                      
Loan-to-value ratio                               52.00%      
Temescal Facility [Member] | LIBOR [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate           1.95%                 2.00%        
Temescal Facility [Member] | Maximum [Member]                                      
Debt Instrument [Line Items]                                      
Loan-to-value ratio                               54.00%      
Glide Funding Term Loan Facility [Member]                                      
Debt Instrument [Line Items]                                      
Credit facility maximum borrowing capacity               $ 500,000,000.0                 $ 500,000,000.0    
Spread over reference rate                               1.60%      
Number of aircraft designated as collateral | aircraft   9                   9              
Credit facility amount outstanding   $ 436,300,000   436,300,000                       $ 436,300,000      
Debt instrument term                                 5 years    
Celtago Facility [Member]                                      
Debt Instrument [Line Items]                                      
Credit facility maximum borrowing capacity                       $ 817,000,000.0              
Number of aircraft designated as collateral | aircraft   13                                  
Credit facility amount outstanding   $ 718,100,000   718,100,000                       718,100,000      
Number of aircraft financed | aircraft                       13              
Celtago Facility [Member] | Base Rate [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate                       1.50%              
Celtago Facility [Member] | LIBOR [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate                       1.50%              
BlowfishFunding Facility [Member]                                      
Debt Instrument [Line Items]                                      
Credit facility maximum borrowing capacity                     $ 650,000,000                
Number of aircraft designated as collateral | aircraft   9                 9                
Credit facility amount outstanding   $ 580,100,000   580,100,000                       580,100,000      
BlowfishFunding Facility [Member] | Base Rate [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate                     1.65%                
BlowfishFunding Facility [Member] | LIBOR [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate                     1.65%                
Celtago II Facility [Member]                                      
Debt Instrument [Line Items]                                      
Credit facility maximum borrowing capacity                   $ 684,000,000.0                  
Number of aircraft designated as collateral | aircraft   13               13                  
Credit facility amount outstanding   $ 629,800,000   629,800,000                       629,800,000      
Celtago II Facility [Member] | Base Rate [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate                   1.75%                  
Celtago II Facility [Member] | LIBOR [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate                   1.75%                  
Iridium Facility [Member]                                      
Debt Instrument [Line Items]                                      
Credit facility maximum borrowing capacity                 $ 595,000,000.0                    
Number of aircraft designated as collateral | aircraft   8             8                    
Credit facility amount outstanding   $ 559,300,000   559,300,000                       559,300,000      
Iridium Facility [Member] | Base Rate [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate                 1.75%                    
Iridium Facility [Member] | LIBOR [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate                 1.75%                    
Scandium Facility [Member]                                      
Debt Instrument [Line Items]                                      
Credit facility maximum borrowing capacity   $ 805,000,000.0   $ 805,000,000.0                       805,000,000.0      
Number of aircraft designated as collateral | aircraft   1   11                              
Credit facility amount outstanding   $ 113,500,000   $ 113,500,000                       $ 113,500,000      
Scandium Facility [Member] | Base Rate [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate   1.60%                                  
Scandium Facility [Member] | LIBOR [Member]                                      
Debt Instrument [Line Items]                                      
Spread over reference rate   1.60%