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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 |
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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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