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Goodwill
 6 Months Ended
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Goodwill
 
The following table provides the components of and changes in the carrying amount of goodwill (in millions):
 
 
Aviation

 
Land

 
Marine

 
Total

Balance as of December 31, 2016
 
$
266.8

 
$
496.7

 
$
72.3

 
$
835.8

Additions
 
39.3

 
—

 
—

 
39.3

Foreign exchange and other adjustments
 
6.8

 
6.1

 
(0.1
)
 
12.8

Balance as of June 30, 2017
 
$
312.9

 
$
502.7

 
$
72.2

 
$
887.9