Earnings (Loss) Per Common Share/Unit (Tables)

12 Months Ended

Dec. 31, 2011

Earnings (Loss) Per Common Share/Unit [Abstract]

Schedule of earnings per share basic and diluted by common class


REIT		2011 (1)				2010 (1)(2)				2009 (1)(2)
Net loss attributable to common shares		$	(188,110)			$	(1,295,920)			$	(2,650)

Weighted average common shares outstanding - Basic and Diluted (3)			370,534				219,515				179,966


Net loss per share attributable to common shares - Basic and Diluted		$	(0.51)			$	(5.90)			$	(0.01)

Operating Partnership
Net loss attributable to common unitholders		$	(188,459)			$	(1,295,920)			$	(2,650)

Weighted average common partnership units outstanding - Basic and Diluted (3)			371,730				219,515				179,966


Net loss per unit attributable to common unitholders - Basic and Diluted		$	(0.51)			$	(5.90)			$	(0.01)

(1)	In periods with a net loss, the inclusion of any incremental shares is anti-dilutive, and therefore, both basic and diluted shares/units are the same.

(2)	As a result of the Merger, the historical shares of ProLogis were adjusted by the Merger exchange ratio of 0.4464 for all periods presented. As a result, the per share/unit calculations and shares/units outstanding were also adjusted.

(3)	Total weighted average potentially dilutive share awards outstanding (in thousands) for the years ended December 31, 2011, 2010 and 2009 were 7,648, 4,498 and 5,151, respectively.