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v3.19.3.a.u2

Commitments and Contingencies (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($)
Commitments and Contingencies Disclosure [Abstract] |
Non-cancelable purchase commitments | $ 65.9
Non-cancelable purchase commitments expected to be paid within the next twelve months | $ 63.8
Standard warranty period (up to) | 30 days
Limited warranty period (up to) | 6 months

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- Definition Standard Product Warrant Description, Duration Following Installation + References No definition available. + Details
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Balance Type: | na
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- Definition Standard Product Warrant, Duration of Limited Warranty + References No definition available. + Details
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Namespace Prefix: | omcl_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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