| Document and Entity Information | Nov. 03, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 3, 2021 |
| Current Fiscal Year End Date | --12-31 |
| Entity Registrant Name | Loyalty Ventures Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-40776 |
| Entity Tax Identification Number | 87-1353472 |
| Entity Address, Address Line One | 7500 DALLAS PARKWAY |
| Entity Address, Address Line Two | SUITE 700 |
| Entity Address, City or Town | PLANO |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75024 |
| City Area Code | 972 |
| Local Phone Number | 338-5170 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
| Entity Central Index Key | 0001870997 |
| Title of 12(b) Security | Common stock |
| Trading Symbol | LYLT |
| Security Exchange Name | NASDAQ |
