Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 8,015.2	$ 8,678.8
Cost of revenue	7,756.4	8,427.7
Gross profit	258.7	251.1
Operating expenses:
Compensation and employee benefits	104.2	110.1
General and administrative	83.7	70.6
Total operating expenses	187.9	180.7
Income from operations	70.8	70.4
Non-operating expenses, net:
Interest expense and other financing costs, net	(15.4)	(19.4)
Other income (expense), net	2.2	0.4
Total non-operating expenses, net	(13.2)	(19.0)
Income (loss) before income taxes	57.6	51.3
Provision for income taxes	16.0	14.0
Net income (loss) including noncontrolling interest	41.6	37.3
Net income (loss) attributable to noncontrolling interest	0.2	0.1
Net income (loss) attributable to World Fuel	$ 41.4	$ 37.2
Basic earnings per common share (in dollars per share)	$ 0.64	$ 0.55
Basic weighted average common shares (in shares)	64.9	67.1
Diluted earnings per common share (in dollars per share)	$ 0.63	$ 0.55
Diluted weighted average common shares (in shares)	65.4	67.4
Comprehensive income:
Net income (loss) including noncontrolling interest	$ 41.6	$ 37.3
Other comprehensive income (loss):
Foreign currency translation adjustments	(33.0)	0.2
Cash flow hedges, net of income tax expense of $7.4 and income tax benefit of $4.1 for the three months ended March 31, 2020 and 2019, respectively	21.7	(11.9)
Other comprehensive income (loss)	(11.3)	(11.7)
Comprehensive income (loss) including noncontrolling interest	30.4	25.6
Comprehensive income (loss) attributable to noncontrolling interest	0.0	(0.8)
Comprehensive income (loss) attributable to World Fuel	$ 30.4	$ 26.3