Cover Page
Jun. 06, 2022
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Entity Central Index Key 0000766704
Document Period End Date Jun. 06, 2022
Entity Registrant Name Welltower Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 1-8923
Entity Tax Identification Number 34-1096634
Entity Address, Address Line One 4500 Dorr Street
Entity Address, City or Town Toledo
Entity Address, State or Province OH
Entity Address, Postal Zip Code 43615
City Area Code 419
Local Phone Number 247-2800
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security Common stock, $1.00 par value per share
Trading Symbol WELL
Security Exchange Name NYSE
Welltower OP Inc [Member]  
Document Information [Line Items]  
Amendment Flag false
Entity Registrant Name Welltower OP LLC.
Entity Incorporation, State or Country Code DE
Entity File Number 333-264093-01
Entity Tax Identification Number 88-1538732
Entity Emerging Growth Company false
Welltower OP Inc [Member] | M4.800 Notes Due 2028 [Member]  
Document Information [Line Items]  
Title of 12(b) Security 4.800% Notes due 2028
Trading Symbol WELL/28
Security Exchange Name NYSE
Welltower OP Inc [Member] | M4.500 Notes Due 2034 [Member]  
Document Information [Line Items]  
Title of 12(b) Security 4.500% Notes due 2034
Trading Symbol WELL/34
Security Exchange Name NYSE