Document and Entity Information - shares shares in Millions	6 Months Ended
	Jun. 30, 2022	Aug. 05, 2022
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Trading Symbol	MPW
Entity Registrant Name	MEDICAL PROPERTIES TRUST, INC.
Entity Central Index Key	0001287865
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		599.0
Title of 12(b) Security	Common stock, par value $0.001 per share, of Medical Properties Trust, Inc.
Security Exchange Name	NYSE
Entity Shell Company	false
Entity File Number	001-32559
Entity Tax Identification Number	20-0191742
Entity Address, Address Line One	1000 URBAN CENTER DRIVE
Entity Address, Address Line Two	SUITE 501
Entity Address, City or Town	BIRMINGHAM
Entity Address, State or Province	AL
Entity Address, Postal Zip Code	35242
City Area Code	205
Local Phone Number	969-3755
Entity Incorporation, State or Country Code	MD
Document Quarterly Report	true
Document Transition Report	false
MPT Operating Partnership, L.P. [Member]
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Entity Registrant Name	MPT OPERATING PARTNERSHIP, L.P.
Entity Central Index Key	0001524607
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity File Number	333-177186
Entity Tax Identification Number	20-0242069
Entity Address, Address Line One	1000 URBAN CENTER DRIVE
Entity Address, Address Line Two	SUITE 501
Entity Address, City or Town	BIRMINGHAM
Entity Address, State or Province	AL
Entity Address, Postal Zip Code	35242
City Area Code	205
Local Phone Number	969-3755
Entity Incorporation, State or Country Code	DE