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Employee Benefits and Share-Based Compensation - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 5,661,000 |  |
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 | $ 8,100,000 | $ 6,800,000 | $ 5,700,000
ESPP |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 603,000 |  |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 2,434,000 |  |
1997 Plan | 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) | 600,000 |  |
Shares purchased under ESPP (in shares) | 316,000 | 287,000 |
Weighted-average price (in dollars per share) | $ 67.63 | $ 62.14 |
Unrecognized compensation cost | $ 2,500,000 |  |
Weighted average period of compensation cost recognized | 1 year 3 months 18 days |  |
2009 Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 5,100,000 |  |
Income tax benefit from share-based compensation | $ 5,200,000 | $ 26,600,000 | $ 10,300,000
2009 Plan | Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Weighted-average fair value per share (in dollars per share) |  | $ 35.17 | $ 26.48
Intrinsic value of options exercised | $ 23,900,000 | $ 88,000,000 | $ 39,800,000
Tax benefit realized from stock options exercised | 4,400,000 | $ 18,300,000 | $ 7,100,000
Unrecognized compensation cost of unvested stock options | $ 16,400,000 |  |
Weighted average period of compensation cost recognized | 1 year 4 months 24 days |  |
2009 Plan | 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% |  |
2009 Plan | Stock Options | Vesting in Equal Monthly Installments |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 36 months |  |
2009 Plan | RSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Weighted average period of compensation cost recognized | 3 years 1 month 6 days |  |
Weighted-average grant date fair value per award granted (in dollars per share) | $ 111.12 | $ 149.65 | $ 74.52
Fair value of awards vested | $ 30,700,000 | $ 16,700,000 | $ 11,200,000
Total unrecognized compensation cost | $ 104,700,000 |  |
Awards granted (in shares) | 746,000 |  |
2009 Plan | 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% |  |
2009 Plan | RSUs | Vesting in Equal Monthly Installments |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
2009 Plan | RSAs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted average period of compensation cost recognized | 4 months 24 days |  |
Weighted-average grant date fair value per award granted (in dollars per share) | $ 109.39 | $ 137.36 | $ 68.11
Fair value of awards vested | $ 1,600,000 | $ 1,400,000 | $ 1,400,000
Total unrecognized compensation cost | $ 500,000 |  |
Awards granted (in shares) | 13,000 |  |
2009 Plan | PSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 4 years |  |
Weighted average period of compensation cost recognized | 1 year 1 month 6 days |  |
Weighted-average grant date fair value per award granted (in dollars per share) | $ 155.27 | $ 162.16 | $ 82.17
Total unrecognized compensation cost | $ 5,800,000 |  |
Awards granted (in shares) | 78,000 |  |
Trading days used for stock price appreciation calculation | 20 days |  |
Fair value of awards vested | $ 15,000,000 | $ 4,400,000 | $ 3,700,000
2009 Plan | PSUs | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of shares eligible for time-based vesting | 0.00% |  |
2009 Plan | PSUs | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of shares eligible for time-based vesting | 200.00% |  |
2009 Plan | PSUs | Officer |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Awards granted (in shares) | 56,237 | 51,110 |
2009 Plan | 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% |  |
2009 Plan | PSUs | Vesting in Equal Semi-Annual Installments, Period One |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 6 months |  |
2009 Plan | PSUs | Vesting in Equal Semi-Annual Installments, Period Two |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 6 months |  |
2009 Plan | PSUs | Vesting in Equal Semi-Annual Installments, Period Three |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 6 months |  |
2009 Plan | PSUs | Vesting in Equal Semi-Annual Installments, Period Four |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 6 months |  |
2009 Plan | PSUs | Vesting in Equal Semi-Annual Installments, Period Five |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 6 months |  |
2009 Plan | PSUs | Vesting in Equal Semi-Annual Installments, Period Six |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 6 months |  |

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