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Acquisitions and Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended				3 Months Ended		9 Months Ended				1 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2011 2011 Acquisitions USD ($) business	Sep. 30, 2011 2011 Acquisitions USD ($)	Sep. 30, 2011 2011 Acquisitions Aviation segment USD ($)	Sep. 30, 2011 2011 Acquisitions Land segment USD ($)	Sep. 30, 2011 2011 Acquisitions Marine segment USD ($)	Jun. 30, 2011 Ascent Aviation Group, Inc. ("Ascent") and other immaterial acquisition business	Apr. 02, 2011 Ascent Aviation Group, Inc. ("Ascent") and other immaterial acquisition site	Sep. 30, 2011 2010 Acquisitions USD ($)	Sep. 30, 2011 2010 Acquisitions Aviation segment USD ($)	Sep. 30, 2011 2010 Acquisitions Land segment USD ($)	Sep. 30, 2011 2010 Acquisitions Marine segment USD ($)	Apr. 30, 2009 Henty Oil Limited, Tank and Marine Engineering Limited and Henty Shipping Services Limited (collectively, "Henty") year	Sep. 30, 2011 Henty Oil Limited, Tank and Marine Engineering Limited and Henty Shipping Services Limited (collectively, "Henty") USD ($)	Sep. 30, 2011 Henty Oil Limited, Tank and Marine Engineering Limited and Henty Shipping Services Limited (collectively, "Henty") GBP (£)	Sep. 30, 2011 Aviation segment USD ($)	Sep. 30, 2010 Aviation segment USD ($)	Sep. 30, 2011 Aviation segment USD ($)	Sep. 30, 2010 Aviation segment USD ($)	Sep. 30, 2011 Land segment USD ($)	Sep. 30, 2010 Land segment USD ($)	Sep. 30, 2011 Land segment USD ($)	Sep. 30, 2010 Land segment USD ($)	Sep. 30, 2011 Marine segment USD ($)	Sep. 30, 2010 Marine segment USD ($)	Sep. 30, 2011 Marine segment USD ($)	Sep. 30, 2010 Marine segment USD ($)
Acquisitions
Number of businesses acquired					4					2
Number of aviation companies acquired					3
Number of land companies acquired					1
Minimum number of airports and fixed base operators supplied by acquired company											450
Increase (decrease) in goodwill													$ (400,000)	$ 11,600,000	$ 2,800,000
Increase (decrease) in identifiable intangible assets													(9,300,000)
Increase (decrease) in fixed assets													(500,000)
Increase (decrease) in long-term liabilities													500,000
Increase (decrease) in the aggregate purchase price of acquisitions												3,900,000
Reconcilition of the estimated aggregate purchase price for the 2011 acquisitions to the cash paid for the acquisitions, net of cash acquired
Estimated purchase price					153,213,000	153,213,000
Promissory notes issued for acquisition	8,300,000		8,300,000		8,278,000	8,278,000
Less: Common stock issued					27,491,000	27,491,000
Estimated cash consideration					117,444,000	117,444,000
Amount due to sellers					6,007,000	6,007,000
Cash consideration paid					111,437,000	111,437,000
Less:Cash acquired												2,638,000
Cash paid for acquisition of businesses, net of cash acquired			(112,315,000)	(46,015,000)								108,799,000
Assets acquired:
Cash and cash equivalents					2,638,000	2,638,000
Accounts receivable					60,923,000	60,923,000
Inventories					38,045,000	38,045,000
Other current and long-term assets					15,713,000	15,713,000
Property and equipment					22,559,000	22,559,000
Identifiable intangible assets					18,780,000	18,780,000
Goodwill					42,850,000	42,850,000	39,500,000	600,000	2,800,000
Liabilities assumed:
Accounts payable					(36,434,000)	(36,434,000)
Assumed employee benefits					(5,421,000)	(5,421,000)
Accrued expenses and other current liabilities					(3,031,000)	(3,031,000)
Other long-term liabilities					(3,409,000)	(3,409,000)
Estimated purchase price					153,213,000	153,213,000
Goodwill anticipated to be deductible for tax purposes					25,900,000	25,900,000
Revenue	9,510,792,000	4,987,074,000	25,298,907,000	13,302,370,000	163,600,000	349,600,000													3,540,503,000	1,857,154,000	9,551,924,000	5,007,920,000	1,925,113,000	773,827,000	5,169,405,000	1,563,094,000	4,045,176,000	2,356,093,000	10,577,578,000	6,731,356,000
Net income	52,655,000	36,755,000	143,967,000	107,435,000	4,700,000	9,200,000
Pro Forma Information
Revenue	9,510,792,000	5,100,149,000	25,486,686,000	13,592,036,000
Net income attributable to World Fuel	52,655,000	38,123,000	151,582,000	109,700,000
Earnings per share:
Basic (in dollars per share)	$ 0.74	$ 0.62	$ 2.14	$ 1.81
Diluted (in dollars per share)	$ 0.74	$ 0.61	$ 2.12	$ 1.78
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																	9,300,000	6,000,000
Minimum Earn-out payment established in consideration for the reduction in the maximum Earn-out																	4,200,000	2,700,000
Fair value of the earn-out liability																	$ 5,000,000	£ 3,200,000

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