Goodwill (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2016	$ 835.8	[1]
Additions	42.1
Foreign exchange and other adjustments	5.5
Balance as of March 31, 2017	883.4	[1]
Aviation segment
Goodwill [Roll Forward]
Balance as of December 31, 2016	266.8
Additions	42.1
Foreign exchange and other adjustments	3.1
Balance as of March 31, 2017	312.0
Land segment
Goodwill [Roll Forward]
Balance as of December 31, 2016	496.7
Additions	0.0
Foreign exchange and other adjustments	2.3
Balance as of March 31, 2017	499.0
Marine segment
Goodwill [Roll Forward]
Balance as of December 31, 2016	72.3
Additions	0.0
Foreign exchange and other adjustments	0.1
Balance as of March 31, 2017	$ 72.4

[1] Amounts may not add due to rounding