XML 83 R64.htm IDEA: XBRL DOCUMENT v3.10.0.1
Equity, Capital and Other Interests - Changes in Operating Partnership's Issued and Outstanding Units (Details) - shares
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
General and Limited Partner Units      
Common Shares And Units Outstanding 381,786,520 380,496,999  
Exercise of share options 1,056,388 846,137 815,044
Employee Share Purchase Plan (ESPP) 75,414 68,286 63,909
Restricted share grants, net 123,800 83,451 147,689
Restricted unit grants, net 267,074 291,647 287,749
Common Shares And Units Outstanding 383,309,196 381,786,520 380,496,999
LIMITED PARTNERS      
Total Units Outstanding 13,768,438 14,626,075 14,427,164
Restricted unit grants, net 267,074 291,647 287,749
Conversion of Limited Partner OP Units to EQR Common Shares (131,477) (1,149,284) (88,838)
Total Units Outstanding 13,904,035 13,768,438 14,626,075
Units Ownership Interest in Operating Partnership 3.60% 3.60% 3.80%
ERPOP [Member]      
General and Limited Partner Units      
Common Shares And Units Outstanding 381,786,520 380,496,999 379,182,608
Exercise of share options 1,056,388 846,137 815,044
Employee Share Purchase Plan (ESPP) 75,414 68,286 63,909
Restricted share grants, net 123,800 83,451 147,689
Restricted unit grants, net 267,074 291,647 287,749
Common Shares And Units Outstanding 383,309,196 381,786,520 380,496,999
LIMITED PARTNERS      
Total Units Outstanding 13,768,438 14,626,075 14,427,164
Restricted unit grants, net 267,074 291,647 287,749
Conversion of Limited Partner OP Units to EQR Common Shares (131,477) (1,149,284) (88,838)
Total Units Outstanding 13,904,035 13,768,438 14,626,075
Units Ownership Interest in Operating Partnership 3.60% 3.60% 3.80%