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Investments (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Investments      
Revenues $ 381 $ 431  
Vricon      
Investments      
Ownership interest 50.00%    
Vricon | Maxar      
Investments      
Revenues     $ 3
Vricon | Saab AB      
Investments      
Revenues     $ 15
Saab AB      
Investments      
Purchases not yet sold to end customer $ 14