Investments in Unconsolidated Entities - Summary of Investments in Unconsolidated Entities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 1,964,267	$ 1,768,772
Non-segment/Corporate
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	73,037	71,109
Seniors Housing Operating
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 1,638,479	1,412,708
Seniors Housing Operating \| Minimum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	10.00%
Seniors Housing Operating \| Maximum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	95.00%
Triple-net
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 25,626	35,066
Triple-net \| Minimum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	10.00%
Triple-net \| Maximum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	25.00%
Outpatient Medical
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 227,125	$ 249,889
Outpatient Medical \| Minimum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	15.00%
Outpatient Medical \| Maximum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	50.00%
Non-segment/Corporate \| Minimum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	21.00%
Non-segment/Corporate \| Maximum
Schedule of Equity Method Investments [Line Items]
Percentage ownership	88.00%

WELLTOWER INC. 10-Q