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v3.19.3.a.u2

Restructuring, Strategic Transaction and Integration Strategic Transaction and Integration Expenses (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Restructuring and Related Activities [Abstract] |  |  |
Strategic Transaction and Integration | $ 72.2 | $ 100.9 | $ 59.2
Supplychainrestructuringcosts | 22.1 |  |
Cleanupcosts | $ 12.7 |  |

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- Definition Cleanupcosts + References No definition available. + Details
Name: | icui_Cleanupcosts
Namespace Prefix: | icui_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Strategic Transaction and Integration + References No definition available. + Details
Name: | icui_StrategicTransactionandIntegration
Namespace Prefix: | icui_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Supplychainrestructuringcosts + References No definition available. + Details
Name: | icui_Supplychainrestructuringcosts
Namespace Prefix: | icui_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedActivitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration