Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	Mar. 31, 2021 USD ($)
Accounting Policies [Abstract]
Loans and/or equity investments in variable interest entities	$ 350

Loans and/or equity investments in variable interest entities.

No definition available.

Name:	mpw_LoansAndOrEquityInvestmentsInVariableInterestEntities
Namespace Prefix:	mpw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant