Income per Unit (Tables)

9 Months Ended

Sep. 30, 2018

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):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2018		2017			2018		2017
Net income (loss) available to common stockholders	$	67,268	$	(4,140	)	$	218,700	$	119,842
Weighted average shares outstanding—basic	206,118,472		170,194,254			205,931,031		163,481,306
Potentially dilutive common shares:
Unvested incentive units	169,100		—			160,117		150,369
Forward equity offering	37,884		—			1,847		166,493
Market performance-based awards	440,800		—			462,632		572,928
Weighted average shares outstanding—diluted	206,766,256		170,194,254			206,555,627		164,371,096
Income (loss) per share:
Basic	$	0.33	$	(0.02	)	$	1.06	$	0.73
Diluted	$	0.33	$	(0.02	)	$	1.06	$	0.73

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:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2018	2017	2018	2017
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	8,170,912	3,266,451	8,268,382	2,566,766
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock	1,727,724	329,709	1,864,489	109,903
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	—	—	—	617,734
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	2,142,282	2,193,331	2,311,864	2,262,875
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	3,139,291	3,214,098	3,387,795	3,316,008
Potentially dilutive Series I Cumulative Redeemable Preferred Stock	2,144,789	2,195,898	2,314,569	2,265,524
Potentially dilutive Series J Cumulative Redeemable Preferred Stock	1,711,186	1,045,730	1,846,643	348,577
Total	19,036,184	12,245,217	19,993,742	11,487,387

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):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2018		2017			2018		2017
Net income (loss) available to common unitholders	$	69,968	$	(4,219	)	$	227,580	$	121,474
Weighted average units outstanding—basic	214,289,384		173,460,704			214,199,414		166,048,072
Potentially dilutive common units:
Unvested incentive units	169,100		—			160,117		166,493
Forward equity offering	37,884		—			1,847		150,369
Market performance-based awards	440,800		—			462,632		572,928
Weighted average units outstanding—diluted	214,937,168		173,460,704			214,824,010		166,937,862
Income (loss) per unit:
Basic	$	0.33	$	(0.02	)	$	1.06	$	0.73
Diluted	$	0.33	$	(0.02	)	$	1.06	$	0.73

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:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2018	2017	2018	2017
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units	1,727,724	329,709	1,864,489	109,903
Potentially dilutive Series F Cumulative Redeemable Preferred Units	—	—	—	617,734
Potentially dilutive Series G Cumulative Redeemable Preferred Units	2,142,282	2,193,331	2,311,864	2,262,875
Potentially dilutive Series H Cumulative Redeemable Preferred Units	3,139,291	3,214,098	3,387,795	3,316,008
Potentially dilutive Series I Cumulative Redeemable Preferred Units	2,144,789	2,195,898	2,314,569	2,265,524
Potentially dilutive Series J Cumulative Redeemable Preferred Units	1,711,186	1,045,730	1,846,643	348,577
Total	10,865,272	8,978,766	11,725,360	8,920,621