| Cover Cover | Jan. 05, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 5, 2022 |
| Entity Registrant Name | Fidelity National Financial, Inc. |
| Entity File Number | 001-32630 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 16-1725106 |
| Entity Address, Address Line One | 601 Riverside Avenue |
| Entity Address, City or Town | Jacksonville |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 32204 |
| City Area Code | 904 |
| Local Phone Number | 854-8100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | FNF Common Stock, $0.0001 par value |
| Trading Symbol | FNF |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001331875 |
| Amendment Flag | false |
| Current Fiscal Year End Date | --12-31 |
