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OTHER EMPLOYEE BENEFITS (Details) - BioMarin Retirement Savings Plan - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Company's contribution to match employees contribution | 100.00% |  |
Employer contribution of maximum percentage over employee's annual compensation | 6.00% |  |
Company's contribution from employment commencement | $ 32.7 | $ 30.8 | $ 31.6

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480794/715-70-50-1 + Details
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