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Acquisitions and Significant Accounting Policies (Details) | 9 Months Ended |  | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 9 Months Ended |  | 0 Months Ended |  |  | 9 Months Ended
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Sep. 30, 2014 USD ($) | Sep. 30, 2013 USD ($) | Dec. 31, 2013 USD ($) | Sep. 30, 2014 Land Segment USD ($) | Sep. 30, 2014 Marine segment USD ($) | Sep. 30, 2014 Aviation Segment USD ($) | Sep. 30, 2014 2014 Acquisitions USD ($) | Sep. 30, 2013 2014 Acquisitions USD ($) | Sep. 30, 2014 2014 Acquisitions USD ($) | Sep. 30, 2013 2014 Acquisitions USD ($) | Sep. 30, 2014 2014 Acquisitions Trademark/Trade name rights USD ($) | Sep. 30, 2014 2014 Acquisitions Customer relationships USD ($) | Sep. 30, 2014 2014 Acquisitions Other identifiable intangible assets USD ($) | Sep. 30, 2014 2014 Acquisitions Land Segment USD ($) | Sep. 30, 2014 2014 Acquisitions Aviation Segment USD ($) | Mar. 07, 2014 2014 Acquisitions Watson Petroleum USD ($) | Mar. 07, 2014 2014 Acquisitions Watson Petroleum GBP (£) | Sep. 30, 2014 2014 Acquisitions Watson Petroleum USD ($) | Sep. 30, 2014 2014 Acquisitions Watson Petroleum GBP (£) | Jul. 29, 2014 2014 Acquisitions Colt location | Sep. 30, 2014 2013 Acquisitions Land Segment USD ($)
Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of locations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000 |
Estimated purchase price of acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated purchase price |  |  |  |  |  |  |  |  | $ 238,523,000 |  |  |  |  |  |  |  |  |  |  |  |
Less: Cash acquired |  |  |  |  |  |  |  |  | 16,167,000 |  |  |  |  |  |  |  |  |  |  |  |
Estimated purchase price, net of cash acquired |  |  |  |  |  |  |  |  | 222,356,000 |  |  |  |  |  |  |  |  |  |  |  |
Less: Promissory notes issued | 9,000,000 | 3,000,000 |  |  |  |  |  |  | 9,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Less: Amounts due to sellers |  |  |  |  |  |  |  |  | 789,000 |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for acquisition of businesses |  |  |  |  |  |  |  |  | 212,567,000 |  |  |  |  |  |  |  |  |  |  |  |
Assets acquired: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  | 16,167,000 |  | 16,167,000 |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  | 256,627,000 |  | 256,627,000 |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  |  |  | 14,412,000 |  | 14,412,000 |  |  |  |  |  |  |  |  |  |  |  |
Property and equipment |  |  |  |  |  |  | 61,960,000 |  | 61,960,000 |  |  |  |  |  |  |  |  |  |  |  |
Identifiable intangible assets |  |  |  |  |  |  | 61,031,000 |  | 61,031,000 |  | 5,800,000 | 51,900,000 | 3,300,000 |  |  |  |  |  |  |  |
Goodwill | 609,915,000 |  | 483,591,000 |  |  |  | 126,962,000 |  | 126,962,000 |  |  |  |  | 100,400,000 | 26,600,000 |  |  |  |  |  |
Other current and long-term assets |  |  |  |  |  |  | 21,275,000 |  | 21,275,000 |  |  |  |  |  |  |  |  |  |  |  |
Weighted average amortizable lives of identifiable intangible assets |  |  |  |  |  |  |  |  |  |  |  | 4 years 2 months 12 days | 2 years 6 months |  |  |  |  |  |  |  |
Adjustments due to fair value assessment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000
Decrease in goodwill due to foreign currency translation adjustments |  |  |  | 700,000 | 300,000 | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill anticipated to be deductible for tax purposes |  |  |  |  |  |  | 20,500,000 |  | 20,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Liabilities assumed: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  | (247,377,000) |  | (247,377,000) |  |  |  |  |  |  |  |  |  |  |  |
Accrued expenses and other current liabilities |  |  |  |  |  |  | (58,771,000) |  | (58,771,000) |  |  |  |  |  |  |  |  |  |  |  |
Other long-term liabilities |  |  |  |  |  |  | (11,908,000) |  | (11,908,000) |  |  |  |  |  |  |  |  |  |  |  |
Initial noncontrolling interest upon acquisition of joint venture |  |  |  |  |  |  | 1,855,000 |  | 1,855,000 |  |  |  |  |  |  |  |  |  |  |  |
Estimate purchase price |  |  |  |  |  |  | 238,523,000 |  | 238,523,000 |  |  |  |  |  |  |  |  |  |  |  |
Escrow payment related to an assumed obligation of an acquired business | 21,724,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,700,000 | 13,000,000 |  |  |  |
Escrow account balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,100,000 | 13,000,000 |  |
Goodwill anticipated to be deductible for tax purposes |  |  |  |  |  |  | 20,500,000 |  | 20,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Pro forma results |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  | 11,748,457,000 | 11,127,729,000 | 34,289,238,000 | 33,031,887,000 |  |  |  |  |  |  |  |  |  |  |
Net income attributable to World Fuel |  |  |  |  |  |  | 56,350,000 | 51,786,000 | 158,778,000 | 160,417,000 |  |  |  |  |  |  |  |  |  |  |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) |  |  |  |  |  |  | $ 0.80 | $ 0.73 | $ 2.24 | $ 2.25 |  |  |  |  |  |  |  |  |  |  |
Diluted (in dollars per share) |  |  |  |  |  |  | $ 0.79 | $ 0.72 | $ 2.23 | $ 2.23 |  |  |  |  |  |  |  |  |  |  |
Other Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other investments | $ 106,400,000 |  | $ 83,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 + Details
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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 + Details
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