Common Stock/Partners' Capital - Additional Information (Detail) - USD ($)				12 Months Ended
	Oct. 09, 2022	Jan. 11, 2021	Dec. 28, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Common stock, shares issued				597,476,000	596,748,000
Proceeds from sale of common shares / units, net of offering costs					$ 1,051,229,000	$ 411,101,000
Shares issued price per share	$ 0.001
Stock repurchase, Value				$ 17,940,000
Stock repurchase program expiration date	Oct. 10, 2023
Redemption of common units						4,928,000
Maximum [Member]
Class Of Stock [Line Items]
Stock repurchase program, authorized amount	$ 500,000,000
MPT Operating Partnership, L.P. [Member]
Class Of Stock [Line Items]
Stock repurchase, Value				17,940,000
Redemption of common units			$ 4,900,000	$ 0		$ 4,928,000
MPT Operating Partnership, L.P. [Member] | Medical Properties Trust, LLC. [Member]
Class Of Stock [Line Items]
Percentage of ownership of general partner				100.00%
MPT Operating Partnership, L.P. [Member] | MPT TRS, Inc [Member]
Class Of Stock [Line Items]
Percentage of ownership of general partner				100.00%
MPT Operating Partnership, L.P. [Member] | Operating Partnership [Member]
Class Of Stock [Line Items]
Percentage of ownership limited partner				100.00%
Common Units [Member]
Class Of Stock [Line Items]
Number of share sold					53,063,000	21,004,000
Stock repurchase, Shares				1,645,000
Stock repurchase, Value				$ 2,000
Common Units [Member] | MPT Operating Partnership, L.P. [Member] | Limited Partner [Member]
Class Of Stock [Line Items]
Number of share sold					52,532,000	20,795,000
Stock repurchase, Shares				1,629,000
Stock repurchase, Value				$ 17,761,000
Conversion of LTIP units to common units			232,000			232,000
Redemption of common units						$ 4,928,000
Public Offering [Member]
Class Of Stock [Line Items]
Common stock, shares issued		36,800,000
Proceeds from sale of common shares / units, net of offering costs		$ 711,000,000
At-the-Market Equity Offering Program [Member]
Class Of Stock [Line Items]
Proceeds from sale of common shares / units, net of offering costs					$ 340,000,000
At-the-Market Equity Offering Program [Member] | Common Units [Member]
Class Of Stock [Line Items]
Number of share sold					16,300,000	21,000,000.0