| Cover Page | Jul. 11, 2024 |
| Document Information [Line Items] | |
| Document Type | 8-K/A |
| Entity Registrant Name | Welltower Inc. |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 is being filed solely for the purpose of addressing and correcting a technical issue which resulted in an inadvertent printer error relating to disclosure of the amount of Notes (as defined herein) issued (which is $1,035,000,000, reflecting the initial purchasers’ full exercise of the option) and the maximum number of shares issuable (which is 9,911,884 shares) under Items 2.03 and 3.02 in the body of the Form 8-K. The Form 8-K otherwise remains unchanged, and no changes have been made to the Indenture, Form of Global Note, Registration Rights Agreement and press release. |
| Entity Central Index Key | 0000766704 |
| Document Period End Date | Jul. 11, 2024 |
| 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 |
| Guarantee of 4.800% Notes due 2028 issued by Welltower OP LLC [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Guarantee of 4.800% Notes due 2028 issued by Welltower OP LLC |
| Trading Symbol | WELL/28 |
| Security Exchange Name | NYSE |
| Guarantee of 4.500% Notes due 2034 issued by Welltower OP LLC [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Guarantee of 4.500% Notes due 2034 issued by Welltower OP LLC |
| Trading Symbol | WELL/34 |
| Security Exchange Name | NYSE |
| Welltower OP LLC [Member] | |
| Document Information [Line Items] | |
| Entity Registrant Name | Welltower OP LLC |
| Entity Central Index Key | 0001917598 |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 333-264093-01 |
| Entity Tax Identification Number | 88-1538732 |
| 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 |
| Welltower OP LLC [Member] | M4.800 Notes Due 2028 [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 4.800% Notes due 2028 |
| Trading Symbol | WELL28 |
| Security Exchange Name | NYSE |
| Welltower OP LLC [Member] | M4.500 Notes Due 2034 [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 4.500% Notes due 2034 |
| Trading Symbol | WELL34 |
| Security Exchange Name | NYSE |
