Goodwill and Identifiable Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Identifiable Intangible Assets
Impairment of goodwill and identifiable intangible assets not subject to amortization	$ 0.0
Goodwill
Balance at the beginning of the period	653.3	$ 483.6
Acquisition of business	39.4	177.9
Adjustment of purchase price allocations		0.4
Goodwill classified as held for sale	(5.9)
Foreign currency translation of non-USD functional currency subsidiary goodwill	(11.0)	(8.6)
Balance at the end of the period	675.8	653.3
Aviation Segment
Goodwill
Balance at the beginning of the period	174.3	115.5
Acquisition of business	1.7	58.9
Foreign currency translation of non-USD functional currency subsidiary goodwill	(2.3)	(0.1)
Balance at the end of the period	173.7	174.3
Marine segment
Goodwill
Balance at the beginning of the period	73.1	69.1
Acquisition of business		4.7
Foreign currency translation of non-USD functional currency subsidiary goodwill	(1.7)	(0.7)
Balance at the end of the period	71.4	73.1
Land Segment
Goodwill
Balance at the beginning of the period	405.9	299.0
Acquisition of business	37.7	114.3
Adjustment of purchase price allocations		0.4
Goodwill classified as held for sale	(5.9)
Foreign currency translation of non-USD functional currency subsidiary goodwill	(7.0)	(7.8)
Balance at the end of the period	$ 430.7	$ 405.9