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Acquisitions - Unaudited Pro Forma Results (Details) - Flyers Energy Group - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021
Business Acquisition [Line Items] |  |
Revenues | $ 7,805.4 | $ 14,141.0
Net income attributable to World Fuel | $ 33.3 | $ 53.5

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