CHICAGO--(BUSINESS WIRE)--Fitch Ratings has upgraded Fidelity National Financial, Inc.'s (FNF) title insurance operating companies' Insurer Financial Strength (IFS) ratings to 'A-' from 'BBB+'. In addition, Fitch has affirmed FNF's Issuer Default Rating (IDR) at 'BBB-' and senior unsecured debt at 'BB+.' The Rating Outlook is Stable. A complete list of rating actions follows at the end of this press release. KEY RATING DRIVERS Fitch's upgrade of FNF's IFS ratings are based on market-leading sca