Income per Unit (Tables)

12 Months Ended

Dec. 31, 2016

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,
	2016		2015		2014
Net income available to common stockholders	$	332,088	$	217,266	$	132,718
Weighted average shares outstanding—basic	149,953,662		138,247,606		133,369,047
Potentially dilutive common shares:
Stock options	9,726		20,424		30,434
Unvested incentive units	71,031		95,746		90,449
Forward equity offering	3,990		—		—
Market performance-based awards	641,279		501,645		147,305
Weighted average shares outstanding—diluted	150,679,688		138,865,421		133,637,235
Income per share:
Basic	$	2.21	$	1.57	$	1.00
Diluted	$	2.20	$	1.56	$	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,
	2016	2015	2014
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,406,018	2,658,291	2,753,614
Potentially dilutive 2029 Debentures	—	—	1,957,963
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	2,880,254	4,301,438	4,956,175
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	1,939,905	2,727,962	3,143,195
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	2,652,503	3,730,042	4,297,805
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	3,886,966	5,465,987	4,320,495
Potentially dilutive Series I Cumulative Redeemable Preferred Stock	2,655,607	1,235,063	—
	16,421,253	20,118,783	21,429,247

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,
	2016		2015		2014
Net income available to common unitholders	$	337,386	$	220,343	$	135,485
Weighted average units outstanding—basic	152,359,680		140,905,897		136,122,661
Potentially dilutive common units:
Stock options	9,726		20,424		30,434
Unvested incentive units	71,031		95,746		90,449
Forward equity offering	3,990		—		—
Market performance-based awards	641,279		501,645		147,305
Weighted average units outstanding—diluted	153,085,706		141,523,712		136,390,849
Income per unit:
Basic	$	2.21	$	1.56	$	1.00
Diluted	$	2.20	$	1.55	$	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,
	2016	2015	2014
Potentially dilutive 2029 Debentures	—	—	1,957,963
Potentially dilutive Series E Cumulative Redeemable Preferred Units	2,880,254	4,301,438	4,956,175
Potentially dilutive Series F Cumulative Redeemable Preferred Units	1,939,905	2,727,962	3,143,195
Potentially dilutive Series G Cumulative Redeemable Preferred Units	2,652,503	3,730,042	4,297,805
Potentially dilutive Series H Cumulative Redeemable Preferred Units	3,886,966	5,465,987	4,320,495
Potentially dilutive Series I Cumulative Redeemable Preferred Units	2,655,607	1,235,063	—
	14,015,235	17,460,492	18,675,633