Document and Entity Information |
Jul. 09, 2025 |
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| Cover [Abstract] | |
| Entity Registrant Name | MP Materials Corp. / DE |
| Amendment Flag | false |
| Entity Central Index Key | 0001801368 |
| Current Fiscal Year End Date | --12-31 |
| Document Type | 8-K |
| Document Period End Date | Jul. 09, 2025 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39277 |
| Entity Tax Identification Number | 84-4465489 |
| Entity Address, Address Line One | 1700 S. Pavilion Center Drive |
| Entity Address, Address Line Two | Suite 800 |
| Entity Address, City or Town | Las Vegas |
| Entity Address, State or Province | NV |
| Entity Address, Postal Zip Code | 89135 |
| City Area Code | (702) |
| Local Phone Number | 844-6111 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value of $0.0001 per share |
| Trading Symbol | MP |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
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- Definition End date of current fiscal year in the format --MM-DD. No definition available.
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- Definition For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD. No definition available.
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- Definition The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'. No definition available.
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- Definition Two-character EDGAR code representing the state or country of incorporation. No definition available.
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- Definition The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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