Commitments and Contingencies (Details) - USD ($) $ in Millions	Apr. 21, 2023	Mar. 31, 2023
Subsequent Event [Line Items]
Non-cancelable purchase commitments		$ 122.2
Non-cancelable purchase commitments expected to be paid within the year		110.0
Loss contingency, expense incurred to date		13.6
Loss contingency, cumulative expected insurance recoveries		11.1
Loss contingency, cumulative insurance recoveries received		$ 9.6
Subsequent Event
Subsequent Event [Line Items]
Payments for legal settlements	$ 4.3

Loss Contingency, Cumulative Expected Insurance Recoveries

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- Definition

Loss Contingency, Cumulative Insurance Recoveries Received

+ References

No definition available.

+ Details

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- Definition

Loss Contingency, Expense Incurred To Date

+ References

No definition available.

+ Details

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Namespace Prefix:	omcl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (g)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-25

+ Details

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Balance Type:	credit
Period Type:	duration

- 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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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of purchase arrangement to be paid in remainder of current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment.

+ References

No definition available.

+ Details

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

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