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Goodwill and Identifiable Intangible Assets - Goodwill (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Goodwill [Roll Forward]    
Balance at the beginning of the period $ 858.6 $ 843.7
Acquisitions 7.5 79.1
Adjustment for sale of business   (71.6)
Foreign currency translation of non-USD functional currency subsidiary goodwill (4.2) 7.4
Balance at the end of the period 861.9 858.6
Goodwill 861.9 858.6
Aviation    
Goodwill [Roll Forward]    
Balance at the beginning of the period 398.8 323.6
Acquisitions 0.0 79.1
Adjustment for sale of business   (7.0)
Foreign currency translation of non-USD functional currency subsidiary goodwill 1.3 3.2
Balance at the end of the period 400.1 398.8
Goodwill 400.1 398.8
Land    
Goodwill [Roll Forward]    
Balance at the beginning of the period 459.7 520.1
Acquisitions 7.5 0.0
Adjustment for sale of business   (64.6)
Foreign currency translation of non-USD functional currency subsidiary goodwill (5.5) 4.3
Balance at the end of the period 461.8 459.7
Goodwill $ 461.8 $ 459.7