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

AeroTurbine Restructuring (Narrative) (Details)

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AeroTurbine Restructuring (Narrative) (Details) - AeroTurbine, Inc. [Member]
$ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
ft²
Dec. 31, 2015
USD ($)
Mar. 20, 2017
ft²
Restructuring Cost and Reserve [Line Items]      
Expense related to a lower of cost or market adjustment of parts inventory $ 36.0 $ 38.7  
Square footage of leased premises | ft² 264,000    
Other operating (loss) income $ (33.9) 14.0  
Pretax loss $ 123.3 $ 74.0  
Subsequent Event [Member]      
Restructuring Cost and Reserve [Line Items]      
Square footage of leased premises | ft²     64,000