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Property And Equipment at Cost Depreciation and Amortization Estimated Useful Lives (Detail) | 12 Months Ended
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Dec. 31, 2015
Land improvements | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 8 years
Land improvements | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 12 years
Buildings and improvements | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 8 years
Buildings and improvements | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 30 years
Machinery, equipment and other | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 3 years
Machinery, equipment and other | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 12 years
Office and transportation equipment | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 3 years
Office and transportation equipment | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 10 years

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- 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_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=iex_MachineryEquipmentAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=iex_OfficeAndTransportationEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |