| Cover | Sep. 23, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 23, 2024 |
| Entity File Number | 811-21309 |
| Entity Registrant Name | Advent Convertible and Income Fund |
| Entity Central Index Key | 0001219120 |
| Entity Tax Identification Number | 11-3683138 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 888 Seventh Avenue, 31st Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10019 |
| City Area Code | 212 |
| Local Phone Number | 482-1600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Shares of Beneficial Interest |
| Trading Symbol | AVK |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
