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Acquisitions and Significant Accounting Policies (Details)	3 Months Ended	6 Months Ended							3 Months Ended		6 Months Ended			6 Months Ended				1 Months Ended
	Jun. 30, 2010 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Apr. 02, 2011 USD ($)	Mar. 31, 2011 USD ($)	Jun. 30, 2011 2011 Acquisitions USD ($)	Jun. 30, 2011 2011 Acquisitions Aviation segment USD ($)	Jun. 30, 2011 2011 Acquisitions Marine segment USD ($)	Jun. 30, 2011 Ascent Aviation Group, Inc. ("Ascent") and other immaterial acquisition USD ($)	Apr. 02, 2011 Ascent Aviation Group, Inc. ("Ascent") and other immaterial acquisition USD ($)	Jun. 30, 2011 Nordic Camp Supply ApS ("NCS")	Apr. 02, 2011 Nordic Camp Supply ApS ("NCS") USD ($)	Mar. 01, 2011 Nordic Camp Supply ApS ("NCS") USD ($)	Jun. 30, 2011 2010 Acquisitions USD ($)	Jun. 30, 2011 2010 Acquisitions Aviation segment USD ($)	Jun. 30, 2011 2010 Acquisitions Land segment USD ($)	Jun. 30, 2011 2010 Acquisitions Marine segment USD ($)	Apr. 30, 2009 Henty Oil Limited, Tank and Marine Engineering Limited and Henty Shipping Services Limited (collectively, "Henty")	Jun. 30, 2011 Henty Oil Limited, Tank and Marine Engineering Limited and Henty Shipping Services Limited (collectively, "Henty") USD ($)	Jun. 30, 2011 Henty Oil Limited, Tank and Marine Engineering Limited and Henty Shipping Services Limited (collectively, "Henty") GBP (£)
Acquisitions
Number of businesses acquired									2
Minimum number of airports and fixed base operators acquired company supplies branded aviation fuel and deicing fluid to										450
Estimated purchase price										$ 48,900,000			$ 94,800,000
Estimated purchase price - cash										37,900,000			67,300,000
Promissory notes issued for acquisition				7,500,000						7,500,000
Amount due to sellers									3,500,000
Goodwill anticipated to be deductible for tax purposes						16,300,000
Estimated purchase price for acquisition paid in shares of common stock					27,500,000								27,500,000
Increase (decrease) in the aggregate purchase price of acquisitions														3,900,000
Increase (decrease) in goodwill															(4,300,000)	11,700,000	1,500,000
Increase (decrease) in identifiable intangible assets															(3,900,000)
Increase (decrease) in fixed assets															(500,000)
Increase (decrease) in long-term liabilities															800,000
Amortization period of identifiable intangible assets (in years)									2.5		1.0
Puchase price allocation
Fixed assets										18,200,000			1,600,000
Identifiable intangible assets										8,000,000			13,600,000
Goodwill							30,400,000	2,800,000		19,100,000			14,100,000
Working capital										3,600,000			68,900,000
Cash										2,100,000		600,000
Long-term deferred tax liabilities													3,400,000
Pro Forma Information
Revenue	4,495,436,000	15,974,965,000	8,490,596,000
Net income attributable to World Fuel	38,189,000	98,903,000	71,441,000
Earnings per share:
Basic (in dollars per share)	$ 0.64	$ 1.39	$ 1.19
Diluted (in dollars per share)	$ 0.62	$ 1.37	$ 1.16
Earn-out
Period for acquiree to meet certain operating targets for earn-out payment (in years)																		3
Maximum Earn-out payment prior to purchase agreement amendment																			9,600,000	6,000,000
Minimum Earn-out payment established in consideration for the reduction in the maximum Earn-out																			4,300,000	2,700,000
Fair value of the earn-out liability																			5,200,000	3,200,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred				$ 7,500,000						$ 7,500,000

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