| Cover | Mar. 17, 2022 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 17, 2022 |
| Entity File Number | 001-40685 |
| Entity Registrant Name | METALS ACQUISITION CORP. |
| Entity Central Index Key | 0001853021 |
| Entity Tax Identification Number | 98-1589041 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 425 Houston Street |
| Entity Address, Address Line Two | Suite 400 |
| Entity Address, City or Town | Fort Worth |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 76102 |
| City Area Code | 817 |
| Local Phone Number | 698-9901 |
| Written Communications | false |
| Soliciting Material | true |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Units, each consisting of one share of Class A ordinary shares, $0.0001 par value, and one-third of one redeemable warrant [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one share of Class A ordinary shares, $0.0001 par value, and one-third of one redeemable warrant |
| Trading Symbol | MTAL.U |
| Security Exchange Name | NYSE |
| Common Class A [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Shares of Class A ordinary shares included as part of the units |
| Trading Symbol | MTAL |
| Security Exchange Name | NYSE |
| Redeemable warrants included as part of the units, each whole warrant exercisable for one share of Class A ordinary shares at an exercise price of $11.50 [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Redeemable warrants included as part of the units, each whole warrant exercisable for one share of Class A ordinary shares at an exercise price of $11 |
| Trading Symbol | MTAL WS |
| Security Exchange Name | NYSE |
