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Goodwill (Details)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
Changes in carrying amounts of goodwill  
Beginning balance $ 586.0
Foreign currency translation (0.3)
Ending balance 585.7
Commercial  
Changes in carrying amounts of goodwill  
Beginning balance 368.9
Foreign currency translation (0.3)
Ending balance 368.6
Aviation  
Changes in carrying amounts of goodwill  
Beginning balance 217.1
Foreign currency translation 0.0
Ending balance $ 217.1