Income per Unit (Tables)

12 Months Ended

Dec. 31, 2019

Class of Stock [Line Items]

Summary of Basic and Diluted Earnings Per Share

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Year Ended December 31,
	2019		2018		2017
Net income available to common stockholders	$	493,011	$	249,930	$	173,148
Weighted average shares outstanding—basic		208,325,823		206,035,408		174,059,386
Potentially dilutive common shares:
Unvested incentive units		165,185		141,260		141,136
Forward equity offering		813,073		33,315		124,527
Market performance-based awards		158,166		463,488		570,049
Weighted average shares outstanding—diluted		209,462,247		206,673,471		174,895,098
Income per share:
Basic	$	2.37	$	1.21	$	0.99
Diluted	$	2.35	$	1.21	$	0.99

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Year Ended December 31,
	2019	2018	2017
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	9,087,726	8,227,463	3,996,550
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock	1,695,765	1,876,584	540,773
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	—	—	463,301
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	2,102,655	2,326,861	2,261,153
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	789,846	3,409,772	3,313,484
Potentially dilutive Series I Cumulative Redeemable Preferred Stock	2,105,116	2,329,584	2,263,799
Potentially dilutive Series J Cumulative Redeemable Preferred Stock	1,679,534	1,858,622	720,803
Potentially dilutive Series K Cumulative Redeemable Preferred Stock	1,334,691	—	—
Potentially dilutive Series L Cumulative Redeemable Preferred Stock	670,823	—	—
Total	19,466,156	20,028,886	13,559,863

Digital Realty Trust, L.P.

Class of Stock [Line Items]

Summary of Basic and Diluted Earnings Per Share

The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts):

	Year Ended December 31,
	2019		2018		2017
Net income available to common unitholders	$	514,111	$	260,110	$	176,918
Weighted average units outstanding—basic		217,284,755		214,312,871		178,055,936
Potentially dilutive common units:
Unvested incentive units		165,185		141,260		141,136
Forward equity offering		813,073		33,315		124,527
Market performance-based awards		158,166		463,488		570,049
Weighted average units outstanding—diluted		218,421,179		214,950,934		178,891,648
Income per unit:
Basic	$	2.37	$	1.21	$	0.99
Diluted	$	2.35	$	1.21	$	0.99

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:

	Year Ended December 31,
	2019	2018	2017
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units	1,695,765	1,876,584	540,773
Potentially dilutive Series F Cumulative Redeemable Preferred Units	—	—	463,301
Potentially dilutive Series G Cumulative Redeemable Preferred Units	2,102,655	2,326,861	2,261,153
Potentially dilutive Series H Cumulative Redeemable Preferred Units	789,846	3,409,772	3,313,484
Potentially dilutive Series I Cumulative Redeemable Preferred Units	2,105,116	2,329,584	2,263,799
Potentially dilutive Series J Cumulative Redeemable Preferred Units	1,679,534	1,858,622	720,803
Potentially dilutive Series K Cumulative Redeemable Preferred Units	1,334,691	—	—
Potentially dilutive Series L Cumulative Redeemable Preferred Units	670,823	—	—
Total	10,378,430	11,801,423	9,563,313