Equity and Redeemable Noncontrolling Interests - Narrative (Details)					3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 30, 2026 USD ($) shares	Jul. 09, 2026 $ / shares	Jun. 04, 2026 USD ($) shares	Mar. 23, 2026 USD ($) shares	Jun. 30, 2026 USD ($) unit entity $ / shares shares	Mar. 31, 2026 USD ($)	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2026 USD ($) unit entity plan_participant $ / shares shares	Jun. 30, 2025 USD ($) unit $ / shares shares	Dec. 31, 2025 USD ($) unit entity shares	Jul. 01, 2026 USD ($)	Jul. 24, 2024 USD ($)
Noncontrolling Interest [Line Items]
Dividends declared per common share (in dollars per share) | $ / shares					$ 0.305		$ 0.305	$ 0.610	$ 0.610
Dividends paid per common share (in dollars per share) | $ / shares					$ 0.305		$ 0.305	$ 0.610	$ 0.610
Issuance of common stock, net					$ 826,000		$ 299,000	$ 1,143,000	$ 553,000
Number of plan participants | plan_participant								1
Noncontrolling interests, currently exercisable put options								$ 14,000,000		$ 14,000,000
Noncontrolling interests, exercisable upon completion of development projects								$ 14,000,000		$ 13,000,000
Units outstanding (in units) | unit					6,000,000			6,000,000		4,000,000
Issuance of OP units criteria redemption (in units) | unit					492,000			492,000		275,000
Value of units meeting criteria for redemption					$ 11,000,000			$ 11,000,000		$ 4,000,000
DownREIT units outstanding (in shares) | shares					11,000,000			11,000,000		11,000,000
Number of DownREIT LLCs | entity					8			8		8
Non-managing member unitholders					$ 355,515,000			$ 355,515,000		$ 347,321,000
Down REIT units, market value					$ 286,000,000			$ 286,000,000		$ 215,000,000
Down REIT
Noncontrolling Interest [Line Items]
Common stock issuable (in shares) | shares					13,000,000			13,000,000		13,000,000
Non-managing member unitholders					$ 307,000,000			$ 307,000,000		$ 307,000,000
Healthpeak OP | Total Noncontrolling Interests
Noncontrolling Interest [Line Items]
Issuance of OP units (in units) | unit								2,000,000	2,000,000
Common stock, unit redemption share amount | shares								1
Janus Living OP | Total Noncontrolling Interests
Noncontrolling Interest [Line Items]
Issuance of OP units (in units) | unit								392,000
Common stock, unit redemption share amount | shares								1
Issuance of OP units criteria redemption (in units) | unit					0			0
Value of units meeting criteria for redemption					$ 0			$ 0
Janus Living, Inc
Noncontrolling Interest [Line Items]
Payments of stock issuance costs					$ 1,000,000	$ 8,000,000
Public Investors | Janus Living, Inc
Noncontrolling Interest [Line Items]
Ownership interest (in percent)					26.40%			26.40%
Gateway Crossing JV
Noncontrolling Interest [Line Items]
Noncontrolling interests redeemable										$ 132,000,000
Ownership (in percent)						50.00%				50.00%
Joint venture acquired						$ 132,000,000
2024 Share Repurchase Program
Noncontrolling Interest [Line Items]
Stock repurchase program, authorized amount												$ 500,000,000
Common stock repurchased (in shares) | shares					5,950,000		3,940,000		5,090,000.00
Average cost per share (in dollars per share) | $ / shares					$ 16.81		$ 18.22		$ 18.50
Stock repurchase program, total value					$ 100,000,000		$ 72,000,000		$ 94,000,000
Class A-1 | Janus Living, Inc
Noncontrolling Interest [Line Items]
Shares issued (in shares) | shares				138,816,246
At-The-Market Program
Noncontrolling Interest [Line Items]
Aggregate amount authorized								$ 1,500,000,000
Issuance of common stock, net					0		0	$ 0	0
At-The-Market Program | Minimum
Noncontrolling Interest [Line Items]
Option indexed to issuers equity, term (in years)								1 year
At-The-Market Program | Maximum
Noncontrolling Interest [Line Items]
Option indexed to issuers equity, term (in years)								2 years
2023 At-The-Market Program
Noncontrolling Interest [Line Items]
Aggregate amount remaining								$ 1,500,000,000
ATM Direct Issuances | Common Stock
Noncontrolling Interest [Line Items]
Issuance of common stock, net					$ 0		$ 0	$ 0	$ 0
IPO | Janus Living, Inc
Noncontrolling Interest [Line Items]
Proceeds from issuance of offering				$ 966,000,000
Payments of stock issuance costs				$ 65,000,000
IPO | Class A-1 | Janus Living, Inc
Noncontrolling Interest [Line Items]
Shares issued (in shares) | shares				48,300,000
Follow-On Offering | Janus Living, Inc
Noncontrolling Interest [Line Items]
Payments of stock issuance costs			$ 28,000,000
Follow-On Offering | Class A-1 | Janus Living, Inc
Noncontrolling Interest [Line Items]
Shares issued (in shares) | shares			25,000,000
Over-Allotment Option | Class A-1 | Janus Living, Inc
Noncontrolling Interest [Line Items]
Shares issued (in shares) | shares			3,750,000
Sale of stock, period of duration for underwriters			30 days
Subsequent Event
Noncontrolling Interest [Line Items]
Dividends declared per common share (in dollars per share) | $ / shares		$ 0.10167
Subsequent Event | 2024 Share Repurchase Program
Noncontrolling Interest [Line Items]
Stock repurchase program, remaining authorized repurchase amount											$ 306,000,000
Subsequent Event | 2026 Share Repurchase Program
Noncontrolling Interest [Line Items]
Stock repurchase program, authorized amount	$ 500,000,000
Common stock repurchased (in shares) | shares	0