Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 5,957.9	$ 8,015.2
Cost of revenue	5,766.3	7,756.4
Gross profit	191.6	258.7
Operating expenses:
Compensation and employee benefits	92.5	102.5
General and administrative	59.4	83.7
Restructuring charges	2.1	1.7
Total operating expenses	154.0	187.9
Income from operations	37.6	70.8
Non-operating income (expenses), net:
Interest expense and other financing costs, net	(8.7)	(15.4)
Other income (expense), net	(1.2)	2.2
Total non-operating expenses, net	(10.0)	(13.2)
Income (loss) before income taxes	27.6	57.6
Provision for income taxes	8.8	16.0
Net income (loss) including noncontrolling interest	18.8	41.6
Net income (loss) attributable to noncontrolling interest	0.0	0.2
Net income (loss) attributable to World Fuel	$ 18.9	$ 41.4
Basic earnings per common share (in dollars per share)	$ 0.30	$ 0.64
Basic weighted average common shares (in shares)	63.0	64.9
Diluted earnings per common share (in dollars per share)	$ 0.30	$ 0.63
Diluted weighted average common shares (in shares)	63.6	65.4
Comprehensive income:
Net income (loss) including noncontrolling interest	$ 18.8	$ 41.6
Other comprehensive income (loss):
Foreign currency translation adjustments	(4.0)	(33.0)
Cash flow hedges, net of income tax expense of $5.6 and expense of $7.4 for the three months ended March 31, 2021 and 2020, respectively	16.4	21.7
Other comprehensive income (loss)	12.4	(11.3)
Comprehensive income (loss) including noncontrolling interest	31.2	30.4
Comprehensive income (loss) attributable to noncontrolling interest	0.0	0.0
Comprehensive income (loss) attributable to World Fuel	$ 31.2	$ 30.4