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Employee Benefits and Share-Based Compensation - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 9,119,000 |  |
Share-based payment arrangement, amount capitalized | $ 4,400,000 |  |
Income tax (expense) benefit from share-based compensation | $ (6,500,000) | $ 5,200,000 | $ 26,600,000
Shares purchased under ESPP (in shares) | 353,000 | 316,000 |
Granted (in shares) | 200,000 | 0 |
2009 Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 5,900,000 |  |
Omnicell Plan | Other Postretirement Benefit Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Employer matching contribution, percent of employee contribution | 50.00% |  |
Maximum amount of employer contribution | $ 3,000 |  |
401(k) contributions | $ 7,900,000 | $ 8,100,000 | $ 6,800,000
ESPP |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Maximum percentage of earnings allowed for purchase of shares | 15.00% |  |
Maximum fair market value of shares | $ 25,000 |  |
Purchase price of common stock, percent | 85.00% |  |
Offering period | 24 months |  |
Purchasing period | 6 months |  |
Shares reserved for future issuance (in shares) | 3,250,000 |  |
Weighted-average price (in dollars per share) | $ 46.68 | $ 67.63 |
Total unrecognized compensation cost | $ 1,100,000 |  |
Weighted average period of compensation cost recognized | 1 year 4 months 24 days |  |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 2,023,000 |  |
Vesting period | 4 years |  |
Weighted average period of compensation cost recognized | 8 months 12 days |  |
Weighted-average fair value per share (in dollars per share) | $ 19.48 |  | $ 35.17
Intrinsic value of options exercised | $ 3,200,000 | $ 23,900,000 | $ 88,000,000
Tax (expense) benefit realized from stock options exercised | (1,300,000) | $ 4,400,000 | $ 18,300,000
Unrecognized compensation cost of unvested stock options | $ 3,300,000 |  |
Stock Options | Vesting One Year from Commencement Date |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Percentage of award vesting | 25.00% |  |
Stock Options | Vesting in Equal Monthly Installments |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 36 months |  |
RSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Total unrecognized compensation cost | $ 64,300,000 |  |
Weighted average period of compensation cost recognized | 3 years |  |
Weighted-average grant date fair value per award granted (in dollars per share) | $ 63.74 | $ 111.12 | $ 149.65
Fair value of awards vested | $ 38,000,000 | $ 30,700,000 | $ 16,700,000
Awards granted (in shares) | 695,000 |  |
RSUs | Vesting One Year from Commencement Date |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Percentage of award vesting | 25.00% |  |
RSUs | Vesting in Equal Monthly Installments |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
RSAs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total unrecognized compensation cost | $ 600,000 |  |
Weighted average period of compensation cost recognized | 4 months 24 days |  |
Weighted-average grant date fair value per award granted (in dollars per share) | $ 70.96 | $ 109.39 | $ 137.36
Fair value of awards vested | $ 1,400,000 | $ 1,600,000 | $ 1,400,000
Awards granted (in shares) | 24,000 |  |
PSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Total unrecognized compensation cost | $ 5,000,000 |  |
Weighted average period of compensation cost recognized | 1 year 4 months 24 days |  |
Weighted-average grant date fair value per award granted (in dollars per share) | $ 122.29 | $ 155.27 | $ 162.16
Awards granted (in shares) | 65,000 |  |
Trading days used for stock price appreciation calculation | 20 days |  |
Fair value of awards vested | $ 6,100,000 | $ 15,000,000 | $ 4,400,000
PSUs | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of shares eligible for time-based vesting | 0.00% |  |
PSUs | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of shares eligible for time-based vesting | 200.00% |  |
PSUs | Officer |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Awards granted (in shares) | 65,000 | 56,237 |
PSUs | Vesting One Year from Commencement Date |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 1 year |  |
Percentage of award vesting | 25.00% |  |
PSUs | Vesting in Equal Monthly Installments |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |

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