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Borrowings - Additional Information (Detail) | 12 Months Ended | 1 Months Ended |  |  |  | 1 Months Ended |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  | 12 Months Ended
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Dec. 31, 2014 USD ($) | Jun. 30, 2010 2.58% Senior Euro Notes EUR (€) | Dec. 31, 2014 2.58% Senior Euro Notes USD ($) | Jun. 09, 2010 2.58% Senior Euro Notes USD ($) | Dec. 31, 2014 2.58% Senior Euro Notes Minimum | Dec. 31, 2010 4.5 % Senior Notes USD ($) | Dec. 06, 2010 4.5 % Senior Notes USD ($) | Apr. 15, 2010 4.5 % Senior Notes | Dec. 31, 2011 4.2% Senior Notes USD ($) | Dec. 31, 2014 4.2% Senior Notes | Dec. 09, 2011 4.2% Senior Notes USD ($) | Dec. 31, 2014 Other Borrowings USD ($) | Dec. 31, 2013 Other Borrowings USD ($) | Dec. 31, 2014 Other Borrowings Minimum | Dec. 31, 2014 Other Borrowings Maximum | Dec. 31, 2014 Letters Of Credit USD ($) | Dec. 31, 2014 Swing line Loans USD ($) | Dec. 31, 2014 Revolving Credit Facility USD ($) | Dec. 31, 2013 Revolving Credit Facility USD ($) | Dec. 31, 2014 Revolving Credit Facility Minimum | Dec. 31, 2014 Revolving Credit Facility Maximum
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Replaced credit facility due to expire | $ 600,000,000 iex_ReplacedCreditFacilityDueToExpire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving facility principal amount | 700,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_DebtInstrumentAxis = us-gaap_StandbyLettersOfCreditMember | 25,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_DebtInstrumentAxis = iex_SwinglineLoansMember |  |  |  |
Revolving facility expiration date | Jun. 27, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate commitments of designated borrowers under the Credit Facility | 950,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.05%iex_ApplicableMarginOverLibor / us-gaap_DebtInstrumentAxis = iex_RevolvingFacilityMember |  | 0.875%iex_ApplicableMarginOverLibor / us-gaap_DebtInstrumentAxis = iex_RevolvingFacilityMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 1.70%iex_ApplicableMarginOverLibor / us-gaap_DebtInstrumentAxis = iex_RevolvingFacilityMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.20%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_DebtInstrumentAxis = iex_RevolvingFacilityMember |  |  |
Leverage ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.25 iex_LeverageRatioRequired / us-gaap_DebtInstrumentAxis = iex_RevolvingFacilityMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Outstanding letters of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,400,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_DebtInstrumentAxis = iex_RevolvingFacilityMember |  |  |
Current borrowings under revolving facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 115,000,000 iex_LineOfRevolvingFacilityAmountOutstanding / us-gaap_DebtInstrumentAxis = iex_RevolvingFacilityMember | 10,000,000 iex_LineOfRevolvingFacilityAmountOutstanding / us-gaap_DebtInstrumentAxis = iex_RevolvingFacilityMember |  |
Revolving Facility, amount available to borrow |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 577,600,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = iex_RevolvingFacilityMember |  |  |
Principal amount of private placement |  | 81,000,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / us-gaap_LongtermDebtTypeAxis = iex_SeniorEuroNotesMember |  |  |  |  |  |  | 350,000,000 us-gaap_ProceedsFromIssuanceOfPrivatePlacement / us-gaap_LongtermDebtTypeAxis = iex_FourPointTwoPercentageSeniorNotesMember |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 2.58%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = iex_SeniorEuroNotesMember |  |  | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = iex_FourPointFivePercentageSeniorNotesMember | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = iex_FourPointFivePercentageSeniorNotesMember |  |  | 4.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = iex_FourPointTwoPercentageSeniorNotesMember |  |  | 0.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = iex_OtherBorrowingsMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 1.30%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = iex_OtherBorrowingsMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |
Debt instrument maturity period |  | Jun. 09, 2015 |  |  |  | Dec. 15, 2020 |  |  | Dec. 15, 2021 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maximum amount outstanding |  |  |  | 750,000,000 iex_DebtInstrumentMaximumAmountOutstanding / us-gaap_LongtermDebtTypeAxis = iex_SeniorEuroNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  | 98,500,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = iex_SeniorEuroNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment, minimum percentage outstanding |  | 5.00%iex_RepaymentMaximumPercentageOutstanding / us-gaap_LongtermDebtTypeAxis = iex_SeniorEuroNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  |  |  |  | 300,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = iex_FourPointFivePercentageSeniorNotesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from debt offering |  |  |  |  |  |  | 295,700,000 iex_NetProceedsFromDebtOffering / us-gaap_LongtermDebtTypeAxis = iex_FourPointFivePercentageSeniorNotesMember |  |  |  | 346,200,000 iex_NetProceedsFromDebtOffering / us-gaap_LongtermDebtTypeAxis = iex_FourPointTwoPercentageSeniorNotesMember |  |  |  |  |  |  |  |  |  |
Debt offering initial discount |  |  |  |  |  |  | 1,600,000 iex_DebtOfferingInitialDiscount / us-gaap_LongtermDebtTypeAxis = iex_FourPointFivePercentageSeniorNotesMember |  |  |  | 900,000 iex_DebtOfferingInitialDiscount / us-gaap_LongtermDebtTypeAxis = iex_FourPointTwoPercentageSeniorNotesMember |  |  |  |  |  |  |  |  |  |
Debt offering underwriting commission |  |  |  |  |  | 1,900,000 us-gaap_OtherUnderwritingExpense / us-gaap_LongtermDebtTypeAxis = iex_FourPointFivePercentageSeniorNotesMember |  |  | 2,300,000 us-gaap_OtherUnderwritingExpense / us-gaap_LongtermDebtTypeAxis = iex_FourPointTwoPercentageSeniorNotesMember |  |  |  |  |  |  |  |  |  |  |  |
Estimated offering expenses |  |  |  |  |  | 800,000 iex_EstimatedOfferingExpenses / us-gaap_LongtermDebtTypeAxis = iex_FourPointFivePercentageSeniorNotesMember |  |  | 600,000 iex_EstimatedOfferingExpenses / us-gaap_LongtermDebtTypeAxis = iex_FourPointTwoPercentageSeniorNotesMember |  |  |  |  |  |  |  |  |  |  |  |
Contingent percentage of principal amount plus accrued and unpaid interest |  |  |  |  |  | 101.00%iex_PercentageOfPrincipalAmountPlusAccruedAndUnpaidInterest / us-gaap_LongtermDebtTypeAxis = iex_FourPointFivePercentageSeniorNotesMember |  |  |  | 101.00%iex_PercentageOfPrincipalAmountPlusAccruedAndUnpaidInterest / us-gaap_LongtermDebtTypeAxis = iex_FourPointTwoPercentageSeniorNotesMember |  |  |  |  |  |  |  |  |  |  |
Outstanding repayment of indebtedness |  |  |  |  |  | 250,000,000 iex_OutstandingRepaymentOfIndebtednessUnderCreditFacility / us-gaap_LongtermDebtTypeAxis = iex_FourPointFivePercentageSeniorNotesMember |  |  | 306,000,000 iex_OutstandingRepaymentOfIndebtednessUnderCreditFacility / us-gaap_LongtermDebtTypeAxis = iex_FourPointTwoPercentageSeniorNotesMember |  |  |  |  |  |  |  |  |  |  |  |
Other borrowings |  |  |  |  |  |  |  |  |  |  |  | $ 2,170,000 us-gaap_OtherBorrowings / us-gaap_LongtermDebtTypeAxis = iex_OtherBorrowingsMember | $ 4,271,000 us-gaap_OtherBorrowings / us-gaap_LongtermDebtTypeAxis = iex_OtherBorrowingsMember |  |  |  |  |  |  |  |
Interest coverage ratio |  |  |  |  | 3.0 iex_InterestCoverageRatio / us-gaap_LongtermDebtTypeAxis = iex_SeniorEuroNotesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Applicable margin over LIBOR + References No definition available. + Details
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- Definition Debt instrument maximum amount outstanding + References No definition available. + Details
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- Definition Debt offering initial discount + References No definition available. + Details
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- Definition Estimated Offering Expenses + References No definition available. + Details
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Balance Type: | debit
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- Definition Interest coverage ratio + References No definition available. + Details
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- Definition Leverage ratio required + References No definition available. + Details
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- Definition Line Of Revolving Facility, Amount Outstanding + References No definition available. + Details
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- Definition Net proceeds from debt offering + References No definition available. + Details
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- Definition Outstanding Repayment Of Indebtedness Under The Credit Facility + References No definition available. + Details
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- Definition Percentage of Principal Amount Plus Accrued And Unpaid Interest + References No definition available. + Details
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- Definition Repayment, Maximum Percentage Outstanding + References No definition available. + Details
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- Definition Replaced credit facility due to expire + References No definition available. + Details
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Period Type: | instant

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Details
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- Definition Maximum amount borrowed under the credit facility at any time during the period. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13, 16 -Article 9 + Details
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- Definition Costs incurred during the period, such as those relating to general administration and policy maintenance that do not vary with and are not primarily related to the acquisition or renewal of insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 7 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.7) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 720 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35755714&loc=d3e28434-158551 + Details
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- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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