Equity, Capital and other Interests (Tables)

6 Months Ended

Jun. 30, 2011

Class of Stock [Line Items]

Common shares and units rollforward

	2011
Common Shares
Common Shares outstanding at January 1,		290,197,242
Common Shares Issued:
Conversion of OP Units		284,691
Issuance of Common Shares		3,038,980
Exercise of share options		2,632,021
Employee Share Purchase Plan (ESPP)		78,121
Restricted share grants, net		151,018
Common Shares Other:
Conversion of restricted shares to LTIP Units		(101,988	)
Common Shares outstanding at June 30,		296,280,085
Units
Units outstanding at January 1,		13,612,037
LTIP Units, net		58,942
Conversion of restricted shares to LTIP Units		101,988
Conversion of OP Units to Common Shares		(284,691	)
Units outstanding at June 30,		13,488,276
Total Common Shares and Units outstanding at June 30,		309,768,361
Units Ownership Interest in Operating Partnership		4.4	%

	2011
General and Limited Partner Units
General and Limited Partner Units outstanding at January 1,		303,809,279
Issued to General Partner:
Issuance of OP Units		3,038,980
Exercise of EQR share options		2,632,021
EQR’s Employee Share Purchase Plan (ESPP)		78,121
EQR restricted share grants, net		151,018
Issued to Limited Partners:
LTIP Units, net		58,942
General and Limited Partner Units outstanding at June 30,		309,768,361
Limited Partner Units
Limited Partner Units outstanding at January 1,		13,612,037
Limited Partner LTIP Units, net		58,942
Conversion of EQR restricted shares to LTIP Units		101,988
Conversion of Limited Partner OP Units to EQR Common Shares		(284,691	)
Limited Partner Units outstanding at June 30,		13,488,276
Limited Partner Units Ownership Interest in Operating Partnership		4.4	%

Preferred shares schedule

					Amounts in thousands
			Annual
	Redemption		Dividend per		June 30,		December 31,
	Date (1)		Share (2)		2011		2010
Preferred Shares of beneficial interest, $0.01 par value; 100,000,000 shares authorized:
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 1,000,000 shares issued and outstanding at June 30, 2011 and December 31, 2010		12/10/26	$	4.145	$	50,000	$	50,000
6.48% Series N Cumulative Redeemable Preferred; liquidation value $250 per share; 600,000 shares issued and outstanding at June 30, 2011 and December 31, 2010 (3)		6/19/08	$	16.20		150,000		150,000
					$	200,000	$	200,000

(1)	On or after the redemption date, redeemable preferred shares (Series K and N) may be redeemed for cash at the option of the Company, in whole or in part, at a redemption price equal to the liquidation price per share, plus accrued and unpaid distributions, if any.
(2)	Dividends on all series of Preferred Shares are payable quarterly at various pay dates. The dividend listed for Series N is a Preferred Share rate and the equivalent Depositary Share annual dividend is $1.62 per share.
(3)	The Series N Preferred Shares have a corresponding depositary share that consists of ten times the number of shares and one-tenth the liquidation value and dividend per share.

					Amounts in thousands
			Annual
	Redemption		Dividend per		June 30,		December 31,
	Date (1)		Unit (2)		2011		2010
Preference Units:
8.29% Series K Cumulative Redeemable Preference Units; liquidation value $50 per unit; 1,000,000 units issued and outstanding at June 30, 2011 and December 31, 2010		12/10/26	$	4.145	$	50,000	$	50,000
6.48% Series N Cumulative Redeemable Preference Units; liquidation value $250 per unit; 600,000 units issued and outstanding at June 30, 2011 and December 31, 2010 (3)		6/19/08	$	16.20		150,000		150,000
					$	200,000	$	200,000

(1)	On or after the redemption date, redeemable preference units (Series K and N) may be redeemed for cash at the option of the Operating Partnership, in whole or in part, at a redemption price equal to the liquidation price per unit, plus accrued and unpaid distributions, if any, in conjunction with the concurrent redemption of the corresponding Company Preferred Shares.
(2)	Dividends on all series of Preference Units are payable quarterly at various pay dates. The dividend listed for Series N is a Preference Unit rate and the equivalent depositary unit annual dividend is $1.62 per unit.
(3)	The Series N Preference Units have a corresponding depositary unit that consists of ten times the number of units and one-tenth the liquidation value and dividend per unit.

OPERATING PARTNERSHIP

Class of Stock [Line Items]

Redeemable noncontrolling interests rollforward

	2011
Balance at January 1,	$	383,540
Change in market value		41,377
Change in carrying value		13,224
Balance at June 30,	$	438,141

LIMITED PARTNERS

Class of Stock [Line Items]

Redeemable noncontrolling interests rollforward

	2011
Balance at January 1,	$	383,540
Change in market value		41,377
Change in carrying value		13,224
Balance at June 30,	$	438,141