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Subsequent Events - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 1 Months Ended
--- | ---
Oct. 22, 2012 | Dec. 31, 2011
Subsequent Event [Line Items] |  |
Increase in share repurchase authorized amount |  | $ 50.0
Stock Repurchase Program |  |
Subsequent Event [Line Items] |  |
Increase in share repurchase authorized amount | $ 200.0 | $ 50.0

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- Definition Increase In Stock Repurchase Program Authorized Amount + References No definition available. + Details
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Namespace Prefix: | iex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration