Equity and Capital - Noncontrolling Interests in Operating Partnership (Details) - USD ($) shares in Thousands, $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Class of Stock
Number of units (units)	302,846	291,148
Percentage of total	97.90%	97.90%
Common stock conversion ratio	1
Digital Realty Trust, L.P.
Class of Stock
Redeemable noncontrolling interests - operating partnership	$ 750.9	$ 591.2
Common units held by third parties
Class of Stock
Common units held by third parties (units)	4,343	4,375
Percentage of total	1.40%	1.50%
Incentive units held by employees and directors (see Note 13. Incentive Plan)
Class of Stock
Incentive units held by employees and directors (units)	2,136	1,914
Percentage of total	0.70%	0.60%
Noncontrolling Interests in Operating Partnership
Class of Stock
Number of units (units)	309,325	297,437
Percentage of total	100.00%	100.00%