Represents the ownership breakdown (not including various uncompleted development projects) of the Company's consolidated and unconsolidated rental properties and number of units associated with each type of property.

No definition available.

Name:	eqr_ScheduleOfPropertiesAndUnitsTableTextBlock
Namespace Prefix:	eqr_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration