former Tex. Elec.Code § 251.008, recodified as § 253.131).
The Act imposes four limitations on the court’s discretion. The first is that fees must be reasonable. In general, “[tjhe reasonableness of attorney’s fees, the recovery of which is authorized by ... statute, is a question of fact for the jury’s determination.”
Trevino v. American Nat’l Ins. Co., 140 Tex. 500, 168 S.W.2d 656, 660 (1943).
Accord: Stewart Title Guar. Co. v. Aiello, 941 S.W.2d 68, 73 (Tex.1997);
Snoke v. Republic Underwriters Ins. Co., 770 S.W.2d 777, 778 (Tex.1989) (per curiam);
Great Am. Reserve Ins. Co. v. Britton, 406 S.W.2d 901, 907 (Tex.1966);
Gulf Paving Co. v. Lofstedt, 144 Tex. 17, 188 S.W.2d 155, 160-161 (1945);
Johnson v. Universal Life & Accident Ins. Co., 127 Tex. 435, 94 S.W.2d 1145, 1146 (1936). The second limitation, that fees must be necessary, is likewise a fact question.
General Motors Corp. v. Bloyed, 916 S.W.2d 949, 961 (Tex.1996). There are, of course, factors prescribed by law which guide the determination of whether attorney fees are reasonable and necessary.
Arthur Andersen, 945 S.W.2d at 818 (quoting Tex. DISCIPLINARY R. Prof. Conduct 1.04,
reprinted in Tex. Gov’t Code., tit. 2, subtit. G app. (State Bar Rules, art. X, § 9)).
The Act’s other two limitations on attorney fees awards are that they must be equitable and just. Matters of equity are addressed to the trial court’s discretion. Knebel v. Capital Nat’l Bank, 518 S.W.2d 795, 799 (Tex.1974); Craddock v. Sunshine Bus Lines, Inc., 134 Tex. 388, 133 S.W.2d 124, 126 (1939). So is the responsibility for just decisions. Murff v. Murff, 615 S.W.2d 696, 699-700 (Tex.1981); Carle v. Carle, 149 Tex. 469, 234 S.W.2d 1002, 1005 (1950).
In sum, then, the Declaratory Judgments Act entrusts attorney fee awards to the trial court’s sound discretion, subject to the requirements that any fees awarded be reasonable and necessary, which are matters of fact, and to the additional requirements that fees be equitable and just, which are matters of law. It is an abuse of discretion for a trial court to rule arbitrarily, unreasonably, or without regard to guiding legal principles, e.g., Goode v. Shoukfeh, 943 S.W.2d 441, 446 (Tex.1997), or to rule without supporting evidence, Beaumont Bank v. Buller, 806 S.W.2d 223, 226 (Tex.1991). Therefore, in reviewing an attorney fee award under the Act, the court of appeals must determine whether the trial court abused its discretion by awarding fees when there was insufficient evidence that the fees were reasonable and necessary, or when the award was inequitable or unjust. Unreasonable fees cannot be awarded, even if the court believed them just, but the court may conclude that it is not equitable or just to award even reasonable and necessary fees. This multi-faceted review involving both evi-dentiary and discretionary matters is required by the language of the Act.
In the present case, we find nothing to indicate that the district court’s attorney fee award was unjust or inequitable, and there was some evidence to support it. The court of appeals did not reach a contrary conclusion. Although the court of appeals’ opinion is not completely clear on the matter, we read it to sustain the Herrings’ complaint that the evidence of reasonableness and necessity of attorney fees was factually insufficient, given the court’s conclusions that the fees awarded were excessive and that a remittitur was appropriate. It would be an abuse of discretion for the district court to award fees without factually sufficient supporting evidence. But before the court of appeals could reach that conclusion, it was required to detail all relevant evidence and explain why the evidence was factually insufficient. Rose v. Doctors Hospital, 801 S.W.2d 841, 848 (Tex.1990). This it did not do.
Accordingly, the Court grants the Bocquet parties’ application for writ of error and, without hearing oral argument, reverses the judgment of the court of appeals and remands the case to that court to redetermine the factual sufficiency of the evidence of the reasonableness and necessity of the attorney fees awarded by the district court. Tex. R.App. P. 59.1. The determination should be made in light of the standards prescribed in Rule 1.04 of the Texas Disciplinary Rules of Professional Conduct. If the court finds the