Disclosure about Fair Value of Financial Instruments - Narrative (Details)	Mar. 31, 2026 shares
Fair Value Disclosures [Abstract]
Shares issuable upon redemption (in shares)	1

Redeemable Noncontrolling Interest, Equity, Shares Issuable Upon Redemption

No definition available.

Name:	well_RedeemableNoncontrollingInterestEquitySharesIssuableUponRedemption
Namespace Prefix:	well_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant