| Cover | Mar. 13, 2022 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 13, 2022 |
| Entity File Number | 001-40290 |
| Entity Registrant Name | MSD ACQUISITION CORP. / NEW |
| Entity Central Index Key | 0001846996 |
| Entity Tax Identification Number | 98-1583537 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | One Vanderbilt Avenue |
| Entity Address, Address Line Two | 26th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10017 |
| City Area Code | (212) |
| Local Phone Number | 303-1650 |
| Written Communications | false |
| Soliciting Material | false |
| 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 Class A ordinary share, $0.0001 par value per share, and one-fifth of one redeemable warrant | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share, $0.0001 par value per share, and one-fifth of one redeemable warrant |
| Trading Symbol | MSDAU |
| Security Exchange Name | NASDAQ |
| Class A ordinary shares included as part of the Units | |
| Title of 12(b) Security | Class A ordinary shares included as part of the Units |
| Trading Symbol | MSDA |
| Security Exchange Name | NASDAQ |
| Redeemable warrants included as part of the units, each whole warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50 | |
| Title of 12(b) Security | Redeemable warrants included as part of the units, each whole warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50 |
| Trading Symbol | MSDAW |
| Security Exchange Name | NASDAQ |
