Equity and Capital - Summary of Activity For Noncontrolling Interests in The Operating Partnership (Details)	3 Months Ended
	Mar. 31, 2022 shares
Common And Incentive Unit Activity [Roll Forward]
Beginning balance (units)	5,931
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (units)	(2)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (units)	(12)
Incentive units issued upon achievement of market performance condition (units)	221
Grant of incentive units to employees and directors (units)	153
Ending balance (units)	6,291
Common Units
Common And Incentive Unit Activity [Roll Forward]
Beginning balance (units)	4,389
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (units)	(2)
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (units)	0
Incentive units issued upon achievement of market performance condition (units)	0
Grant of incentive units to employees and directors (units)	0
Ending balance (units)	4,387
Incentive Units
Common And Incentive Unit Activity [Roll Forward]
Beginning balance (units)	1,542
Redemption of common units for shares of Digital Realty Trust, Inc. common stock (units)	0
Conversion of incentive units held by employees and directors for shares of Digital Realty Trust, Inc. common stock (units)	(12)
Incentive units issued upon achievement of market performance condition (units)	221
Grant of incentive units to employees and directors (units)	153
Ending balance (units)	1,904