Earnings per Common Share or Unit - Summary of Basic and Diluted Earnings per Share and Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Class of Stock
Net income available to common stockholders	$ 63,100	$ 372,406
Weighted average units outstanding-basic (shares/units)	284,526	281,095
Potentially dilutive common shares/units:
Unvested incentive units (shares/units)	348	324
Unvested restricted stock (shares/units)	91	158
Market performance-based awards (shares/units)	60	340
Weighted average shares/units outstanding-diluted (shares/units)	285,025	281,917
Income per share/unit:
Basic (in dollars per share/unit)	$ 0.22	$ 1.32
Diluted (in dollars per share/unit)	$ 0.22	$ 1.32
Digital Realty Trust, L.P.
Class of Stock
Net income available to common stockholders	$ 64,700	$ 382,206
Weighted average units outstanding-basic (shares/units)	290,163	288,377
Potentially dilutive common shares/units:
Unvested incentive units (shares/units)	348	324
Unvested restricted stock (shares/units)	91	158
Market performance-based awards (shares/units)	60	340
Weighted average shares/units outstanding-diluted (shares/units)	290,662	289,199
Income per share/unit:
Basic (in dollars per share/unit)	$ 0.22	$ 1.32
Diluted (in dollars per share/unit)	$ 0.22	$ 1.32