| Document and Entity Information | Nov. 12, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 12, 2021 |
| Entity Registrant Name | Otis Worldwide Corp |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39221 |
| Entity Tax Identification Number | 83-3789412 |
| Entity Address, Address Line One | One Carrier Place |
| Entity Address, City or Town | Farmington |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06032 |
| City Area Code | 860 |
| Local Phone Number | 674-3000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001781335 |
| Title of 12(b) Security | Common Stock ($0.01 par value) |
| Trading Symbol | OTIS |
| Security Exchange Name | NYSE |
