XML 40 R56.htm IDEA: XBRL DOCUMENT v2.4.0.6

Commitments and Contingencies (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Deferred Compensation Plans
Liabilities under long-term service programs	$ 1.5	$ 1.1
Deferred sales bonus	0.5	0.9
U.S. defined contribution plan
Defined Contribution Plans [Line Items]
Employee contribution limit per calendar year (as a percent of compensation)	60.00%
Employer match for each 1% of the participants contributions up to 6% of the participants contributions (as a percent)	50.00%	50.00%	50.00%
Percentage of eligible compensation up to 6% of the eligible compensation, matched 50% by employer	1.00%	1.00%	1.00%
Employer contribution limit per calendar year (as a percent of compensation)	6.00%	6.00%	6.00%
Expenses recognized for contributions	1.5	1.2	1.0
Foreign defined contribution plans
Defined Contribution Plans [Line Items]
Expenses recognized for contributions	$ 2.0	$ 1.2	$ 1.0

X

- Definition

Represents aggregate carrying value as of the balance sheet date of the deferred sales bonus payable under deferred compensation arrangements.

+ References

No definition available.

+ Details

Name:	int_DeferredCompensationArrangementDeferredSalesBonusLiabilityNoncurrent
Namespace Prefix:	int_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The limit of annual employee contributions to the plan per calendar year as a percentage of compensation.

+ References

No definition available.

+ Details

Name:	int_DefinedContributionPlanEmployeeContributionLimitPercentageOfCompensation
Namespace Prefix:	int_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The limit of annual employer contributions to the plan per calendar year as a percentage of compensation.

+ References

No definition available.

+ Details

Name:	int_DefinedContributionPlanEmployerContributionLimitPercentageOfCompensation
Namespace Prefix:	int_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the employer matching contributions for the employees' contributions.

+ References

No definition available.

+ Details

Name:	int_DefinedContributionPlanEmployerMatch
Namespace Prefix:	int_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the first level of employee contributions (percentage of compensation) which are matched by the employer.

+ References

No definition available.

+ Details

Name:	int_DefinedContributionPlanEmployerMatchEmployeeContributionLevelOne
Namespace Prefix:	int_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	int_DefinedContributionPlansLineItems
Namespace Prefix:	int_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DeferredCompensationArrangementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements. Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration