XML 83 R65.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Commitments and Contingencies - Legal, Tax, and Other Matters (Details) R$ in Millions, $ in Millions, ₩ in Billions | 3 Months Ended |
--- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2017 KRW (₩) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 KRW (₩) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 BRL (R$)
Loss Contingencies [Line Items] |  |  |  |  |  |
Aggregate amount including principal and interest |  |  |  |  | $ 33.0 |
Tax Authority, South Korea (SRTO) | Assessment | Foreign Tax Authority |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Pre-assessment notice, amount |  |  | $ 9.9 | ₩ 11.7 |  |
Tax Authority, South Korea (SRTO) | Tax authority additional assessment | Foreign Tax Authority |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Pre-assessment notice, amount | $ 16.9 | ₩ 20.1 |  |  |  |
Federal, state and municipal tax authorities in Brazil | Assessment | Foreign Tax Authority |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Estimate of possible loss |  |  |  |  | $ 10.5 | R$ 58.8

X
- Definition Long Term Debt Contingent Aggregate Amount Of Principal Or Interest + References No definition available. + Details
Name: | int_LongTermDebtContingentAggregateAmountOfPrincipalOrInterest
Namespace Prefix: | int_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of estimated penalties recognized in the period arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
Name: | us-gaap_IncomeTaxExaminationPenaltiesExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248 + Details
Name: | us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeTaxAuthorityNameAxis=int_TaxAuthoritySouthKoreaSRTOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=int_TaxAuthorityAssessmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_ForeignCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=int_TaxAuthorityAdditionalAssessmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityNameAxis=int_StateAndMunicipalTaxAuthoritiesAndSecretariatOfTheFederalRevenueBureauOfBrazilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |