Annual report pursuant to Section 13 and 15(d)

Equity Method Investments - Narrative (Details)

v3.20.1
Equity Method Investments - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jul. 27, 2016
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]        
Difference between carrying value of equity method investment and equity     $ 55.8  
Finite lived intangible asset, weighted average useful life 14 years 10 months 24 days      
Wireless Maritime Services        
Schedule of Equity Method Investments [Line Items]        
Equity method investment, ownership percentage 49.00%   49.00%  
Impairment loss   $ 51.0 $ 0.0 $ 51.0
Santander        
Schedule of Equity Method Investments [Line Items]        
Equity method investment, ownership percentage 49.00%   49.00%