Equity and Accumulated Other Comprehensive Income (Loss), Net - Forward Equity Sale (Details) - USD ($) $ in Billions	Sep. 24, 2020	Sep. 27, 2018
Forward Sale Agreement
Class of Stock
Common stock issued in public offering (shares)	9,775,000
Forward Sale Agreement | Digital Realty Trust, L.P.
Class of Stock
Common stock issued in public offering (shares)	9,775,000	9,775,000
Net proceeds on public offering	$ 1.0
Over-Allotment Option
Class of Stock
Net proceeds on public offering	$ 1.0
Over-Allotment Option | Digital Realty Trust, L.P.
Class of Stock
Common stock issued in public offering (shares)		1,275,000