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

Geographic information (Long-lived assets by individual countries) (Details)

v3.8.0.1
Geographic information (Long-lived assets by individual countries) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]      
Long-lived assets $ 35,408,168 $ 34,277,259  
AeroTurbine, Inc. [Member]      
Segment Reporting Information [Line Items]      
Long-lived assets   $ 105,700  
Geographic Concentration Risk | Sales Revenue, Segment [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 100.00% 100.00% 100.00%
Geographic Concentration Risk | Long-Lived Assets [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 100.00% 100.00%  
China      
Segment Reporting Information [Line Items]      
Long-lived assets $ 5,218,057 $ 4,962,336  
China | Geographic Concentration Risk | Sales Revenue, Segment [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 13.80% 13.80% 13.20%
China | Geographic Concentration Risk | Long-Lived Assets [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 14.70% 14.50%  
United States      
Segment Reporting Information [Line Items]      
Long-lived assets $ 4,816,416 $ 4,752,971  
United States | Geographic Concentration Risk | Sales Revenue, Segment [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 12.10% 11.00% 10.80%
United States | Geographic Concentration Risk | Long-Lived Assets [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 13.60% 13.90%  
Ireland      
Segment Reporting Information [Line Items]      
Long-lived assets $ 1,141,992 $ 703,635  
Ireland | Geographic Concentration Risk | Sales Revenue, Segment [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 2.60% 2.40% 1.20%
Ireland | Geographic Concentration Risk | Long-Lived Assets [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 3.20% 2.10%  
Other Countries      
Segment Reporting Information [Line Items]      
Long-lived assets $ 24,231,703 $ 23,858,317  
Other Countries | Geographic Concentration Risk | Sales Revenue, Segment [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 71.50% 72.80% 74.80%
Other Countries | Geographic Concentration Risk | Long-Lived Assets [Member]      
Segment Reporting Information [Line Items]      
Percentage of long-lived assets 68.50% 69.50%