Name:	pmgmu_AdvanceNoticePriorToApplicableDeadlineAffiliatesOrDesigneesMustDepositIntoTrustAccount
Namespace Prefix:	pmgmu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Price per share or per unit of warrants or rights outstanding.

No definition available.

Name:	pmgmu_ClassOfWarrantOrRightPriceOfWarrantsOrRights
Namespace Prefix:	pmgmu_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Amount of gross proceeds from issuance of warrants.

No definition available.

Name:	pmgmu_GrossProceedsFromIssuanceOfWarrants
Namespace Prefix:	pmgmu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The percentage of shares which the reporting entity is obligated to redeem if a business combination is not consummated using the offering proceeds within a specified period.

No definition available.

Name:	pmgmu_PercentageObligationToRedeemPublicSharesIfEntityDoesNotCompleteBusinessCombination
Namespace Prefix:	pmgmu_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	pmgmu_PrivatePlacementLineItems
Namespace Prefix:	pmgmu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

This represents information about threshold period from the closing of the proposed public offering to consummate an initial business combination.

No definition available.

Name:	pmgmu_ThresholdPeriodFromClosingOfProposedPublicOfferingToConsummateInitialBusinessCombination
Namespace Prefix:	pmgmu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

This represents information about threshold period from the closing of the proposed public offering to consummate an initial business combination after extension, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

Name:	pmgmu_ThresholdPeriodFromClosingOfProposedPublicOfferingToConsummateInitialBusinessCombinationAfterExtension
Namespace Prefix:	pmgmu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644