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Equity and Accumulated Other Comprehensive Loss, Net (Forward Equity Sale) (Details) - Digital Realty Trust, L.P. - USD ($) $ in Billions	Sep. 27, 2019	Sep. 27, 2018
Forward Sale Agreement
Class of Stock [Line Items]
Common stock issued in public offering (shares)		9,775,000
Net proceeds on public offering	$ 1.1
Over-Allotment Option
Class of Stock [Line Items]
Common stock issued in public offering (shares)		1,275,000