0001628280-21-015047 | 10-Q | XBRL Viewer

Cover - shares	6 Months Ended
Cover - shares	Jun. 30, 2021	Jul. 23, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	001-09533
Entity Registrant Name	WORLD FUEL SERVICES CORPORATION
Entity Incorporation, State or Country Code	FL
Entity Address, Address Line One	9800 N.W. 41st Street,
Entity Address, City or Town	Miami,
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33178
Entity Tax Identification Number	59-2459427
City Area Code	305
Local Phone Number	428-8000
Title of 12(b) Security	Common Stock , $0.01 par value
Trading Symbol	INT
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		63,502,254
Entity Central Index Key	0000789460
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2

Label	Element	Value
Cost Of Revenue, Excluding Hedging Impact Of Hedges	int_CostOfRevenueExcludingHedgingImpactOfHedges	$ 6,972,200,000
Cost Of Revenue, Excluding Hedging Impact Of Hedges	int_CostOfRevenueExcludingHedgingImpactOfHedges	2,892,600,000
Cost Of Revenue, Excluding Hedging Impact Of Hedges	int_CostOfRevenueExcludingHedgingImpactOfHedges	12,763,200,000
Cost Of Revenue, Excluding Hedging Impact Of Hedges	int_CostOfRevenueExcludingHedgingImpactOfHedges	10,643,100,000
Derivative, Gain (Loss) on Derivative, Not Recorded In Accumulated Other Comprehensive Income (Loss) Due To Intra-Period Settlement, After Tax	int_DerivativeGainLossOnDerivativeNotRecordedInAccumulatedOtherComprehensiveIncomeLossDueToIntraPeriodSettlementAfterTax	(113,800,000)
Derivative, Gain (Loss) on Derivative, Not Recorded In Accumulated Other Comprehensive Income (Loss) Due To Intra-Period Settlement, After Tax	int_DerivativeGainLossOnDerivativeNotRecordedInAccumulatedOtherComprehensiveIncomeLossDueToIntraPeriodSettlementAfterTax	140,900,000
Derivative, Gain (Loss) on Derivative, Not Recorded In Accumulated Other Comprehensive Income (Loss) Due To Intra-Period Settlement, After Tax	int_DerivativeGainLossOnDerivativeNotRecordedInAccumulatedOtherComprehensiveIncomeLossDueToIntraPeriodSettlementAfterTax	(190,600,000)
Derivative, Gain (Loss) on Derivative, Not Recorded In Accumulated Other Comprehensive Income (Loss) Due To Intra-Period Settlement, After Tax	int_DerivativeGainLossOnDerivativeNotRecordedInAccumulatedOtherComprehensiveIncomeLossDueToIntraPeriodSettlementAfterTax	303,300,000
Derivative, Gain (Loss) on Derivative, Not Recorded In Accumulated Other Comprehensive Income (Loss) Due To Intra-Period Settlement, After Tax	int_DerivativeGainLossOnDerivativeNotRecordedInAccumulatedOtherComprehensiveIncomeLossDueToIntraPeriodSettlementAfterTax	8,000,000.0
Derivative, Gain (Loss) on Derivative, Not Recorded In Accumulated Other Comprehensive Income (Loss) Due To Intra-Period Settlement, After Tax	int_DerivativeGainLossOnDerivativeNotRecordedInAccumulatedOtherComprehensiveIncomeLossDueToIntraPeriodSettlementAfterTax	(83,400,000)
Derivative, Gain (Loss) on Derivative, Not Recorded In Accumulated Other Comprehensive Income (Loss) Due To Intra-Period Settlement, After Tax	int_DerivativeGainLossOnDerivativeNotRecordedInAccumulatedOtherComprehensiveIncomeLossDueToIntraPeriodSettlementAfterTax	15,200,000
Derivative, Gain (Loss) on Derivative, Not Recorded In Accumulated Other Comprehensive Income (Loss) Due To Intra-Period Settlement, After Tax	int_DerivativeGainLossOnDerivativeNotRecordedInAccumulatedOtherComprehensiveIncomeLossDueToIntraPeriodSettlementAfterTax	(173,500,000)
Accounts Receivable, Allowance For Credit Loss, Foreign Currency Translation	int_AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation	(100,000)
Accounts Receivable, Allowance For Credit Loss, Foreign Currency Translation	int_AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation	100,000
Intangible Assets, Net Excluding Goodwill and Other Assets, Noncurrent	int_IntangibleAssetsNetExcludingGoodwillAndOtherAssetsNoncurrent	698,100,000
Intangible Assets, Net Excluding Goodwill and Other Assets, Noncurrent	int_IntangibleAssetsNetExcludingGoodwillAndOtherAssetsNoncurrent	659,800,000
Income Tax Concession, Impact On Foreign Income Tax Expense (Benefit)	int_IncomeTaxConcessionImpactOnForeignIncomeTaxExpenseBenefit	200,000
Income Tax Concession, Impact On Foreign Income Tax Expense (Benefit)	int_IncomeTaxConcessionImpactOnForeignIncomeTaxExpenseBenefit	800,000
Income Tax Concession, Impact On Foreign Income Tax Expense (Benefit)	int_IncomeTaxConcessionImpactOnForeignIncomeTaxExpenseBenefit	600,000
Income Tax Concession, Impact On Foreign Income Tax Expense (Benefit)	int_IncomeTaxConcessionImpactOnForeignIncomeTaxExpenseBenefit	2,700,000
Interest Expense And Other Financing Costs	int_InterestExpenseAndOtherFinancingCosts	11,400,000
Interest Expense And Other Financing Costs	int_InterestExpenseAndOtherFinancingCosts	10,700,000
Interest Expense And Other Financing Costs	int_InterestExpenseAndOtherFinancingCosts	22,500,000
Interest Expense And Other Financing Costs	int_InterestExpenseAndOtherFinancingCosts	26,900,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	2,400,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	2,400,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	2,400,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	3,100,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	3,100,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	3,100,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	1,500,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	1,500,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	1,500,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	1,200,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	1,200,000
Share Repurchases Related to Employee Stock Based Compensation Awards, Value	int_ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	1,200,000
Disposal Group, Including Discontinued Operation, Contingent Consideration	int_DisposalGroupIncludingDiscontinuedOperationContingentConsideration	30,000,000
Increase (Decrease) in Income Tax and Other Liabilities, Noncurrent	int_IncreaseDecreaseInIncomeTaxAndOtherLiabilitiesNoncurrent	23,800,000
Increase (Decrease) in Income Tax and Other Liabilities, Noncurrent	int_IncreaseDecreaseInIncomeTaxAndOtherLiabilitiesNoncurrent	33,700,000
Revenue, Excluding Impact Of Hedges	int_RevenueExcludingImpactOfHedges	7,088,400,000
Revenue, Excluding Impact Of Hedges	int_RevenueExcludingImpactOfHedges	3,131,400,000
Revenue, Excluding Impact Of Hedges	int_RevenueExcludingImpactOfHedges	13,058,000,000.0
Revenue, Excluding Impact Of Hedges	int_RevenueExcludingImpactOfHedges	11,132,500,000
Interest Expense And Other Financing Costs, Excluding Hedging Impact Of Hedges	int_InterestExpenseAndOtherFinancingCostsExcludingHedgingImpactOfHedges	11,100,000
Interest Expense And Other Financing Costs, Excluding Hedging Impact Of Hedges	int_InterestExpenseAndOtherFinancingCostsExcludingHedgingImpactOfHedges	10,700,000
Interest Expense And Other Financing Costs, Excluding Hedging Impact Of Hedges	int_InterestExpenseAndOtherFinancingCostsExcludingHedgingImpactOfHedges	22,000,000.0
Interest Expense And Other Financing Costs, Excluding Hedging Impact Of Hedges	int_InterestExpenseAndOtherFinancingCostsExcludingHedgingImpactOfHedges	26,900,000
Deferred Income Tax Expense (Benefit), Excluding Valuation Allowance Deferred Tax Asset Change In Amount	int_DeferredIncomeTaxExpenseBenefitExcludingValuationAllowanceDeferredTaxAssetChangeInAmount	(15,400,000)
Deferred Income Tax Expense (Benefit), Excluding Valuation Allowance Deferred Tax Asset Change In Amount	int_DeferredIncomeTaxExpenseBenefitExcludingValuationAllowanceDeferredTaxAssetChangeInAmount	(5,300,000)
Increase (Decrease) in Accrued Expenses and Other Liabilities	int_IncreaseDecreaseInAccruedExpensesAndOtherLiabilities	41,100,000
Increase (Decrease) in Accrued Expenses and Other Liabilities	int_IncreaseDecreaseInAccruedExpensesAndOtherLiabilities	(25,200,000)
Increase (Decrease) In Contract With Customer, Refund Liability	int_IncreaseDecreaseInContractWithCustomerRefundLiability	(2,700,000)
Increase (Decrease) In Contract With Customer, Refund Liability	int_IncreaseDecreaseInContractWithCustomerRefundLiability	(2,300,000)
Fees And Interest Paid Under Receivables Purchase Agreements	int_FeesAndInterestPaidUnderReceivablesPurchaseAgreements	9,400,000
Fees And Interest Paid Under Receivables Purchase Agreements	int_FeesAndInterestPaidUnderReceivablesPurchaseAgreements	$ 5,500,000

Debt, Interest Income, Expense, and Other Finance Costs - Interest Income (Expense), and Other Financing Costs, net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt, Interest Income, Expense and Other Finance Costs [Abstract]
Interest income (expense) and other financing costs, net	$ (10.0)	$ (10.0)	$ (18.7)	$ (25.3)

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Cover Cover Notes Details Debt, Interest Income, Expense, and Other Finance Costs - Interest Income (Expense), and Other Financing Costs, net (Details) Uncategorized Uncategorized Items - int-20210630_htm.xml All Reports