XML 26 R14.htm IDEA: XBRL DOCUMENT v3.25.3

CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL OF ERP OPERATING LIMITED PARTNERSHIP (Parenthetical) - Eight Point Two Nine Percentage Series K Cumulative Redeemable Preferred Stock [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Partial Redemption Percentage	8.29%	8.29%	8.29%	8.29%
ERPOP [Member]
Partial Redemption Percentage	8.29%	8.29%	8.29%	8.29%

X

- Definition

Partial redemption percentage

+ References

No definition available.

+ Details

Name:	eqr_PartialRedemptionPercentage
Namespace Prefix:	eqr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=eqr_EightPointTwoNinePercentageSeriesKCumulativeRedeemablePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=eqr_ERPOPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: