Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenue	[1]	$ 8,194.3	$ 5,190.8
Cost of revenue	[1]	7,962.9	4,969.3
Gross profit	[1]	231.4	221.5
Operating expenses:
Compensation and employee benefits	[1]	104.5	95.9
Provision for bad debt	[1]	2.5	1.5
General and administrative	[1]	74.1	63.1
Total operating expenses	[1]	181.1	160.5
Income from operations	[1]	50.3	61.0
Non-operating expenses, net:
Interest expense and other financing costs, net	[1]	(12.7)	(7.6)
Other (expense) income, net	[1]	(1.6)	1.3
Total non-operating expenses, net	[1]	(14.3)	(6.3)
Income before income taxes	[1]	36.1	54.8
Provision for income taxes	[1]	5.0	3.1
Net income including noncontrolling interest	[1]	31.1	51.6
Net loss attributable to noncontrolling interest	[1]	(0.3)	(0.1)
Net income attributable to World Fuel	[1]	$ 31.3	$ 51.8
Basic earnings per common share (in dollars per share)	[1]	$ 0.46	$ 0.74
Basic weighted average common shares (in shares)	[1]	68.7	69.5
Diluted earnings per common share (in dollars per share)	[1]	$ 0.45	$ 0.74
Diluted weighted average common shares (in shares)	[1]	69.2	70.0
Comprehensive income:
Net income including noncontrolling interest	[1]	$ 31.1	$ 51.6
Other comprehensive income (loss):
Foreign currency translation adjustments	[1]	6.4	1.3
Cash Flow hedges, net of income tax benefit of $6.5 for the three months ended March 31, 2017	[1]	10.5	(0.2)
Other comprehensive income	[1]	16.9	1.0
Comprehensive income including noncontrolling interest	[1]	48.0	52.7
Comprehensive (loss) income attributable to noncontrolling interest	[1]	(0.1)	1.5
Comprehensive income attributable to World Fuel	[1]	$ 48.0	$ 51.2

[1] Amounts may not add due to rounding