Miller v. Miller

CourtIdaho Supreme Court
DecidedMarch 24, 2026
Docket52616
StatusPublished

This text of Miller v. Miller (Miller v. Miller) is published on Counsel Stack Legal Research, covering Idaho Supreme Court primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Miller v. Miller, (Idaho 2026).

Opinion

IN THE SUPREME COURT OF THE STATE OF IDAHO Docket No. 52616-2025

ELIZABETH MILLER, ) ) Petitioner-Respondent, ) Boise, January 2026 Term ) v. ) Opinion Filed: March 24, 2026 ) MARK MILLER, ) Melanie Gagnepain, Clerk ) Respondent-Appellant, ) ____________________________________)

Appeal from the District Court of the Fourth Judicial District of the State of Idaho, Ada County. Gerald F. Schroeder, Senior District Judge. Matthew Haynes, Magistrate Judge.

The decision of the district court is affirmed. The case is remanded to the district court with instructions to remand to the magistrate court to consider an award of attorney fees.

Stoel Rives LLP, Boise, and Law Office of Jeffrey T. Sheehan, PLLC, Boise, for Appellant. W. Christopher Pooser argued.

Cosho Humphrey LLP, Boise, for Respondent. Mackenzie Whatcott argued. _________________________________

BEVAN, Chief Justice. This case concerns the arbitrability of a divorce action. Elizabeth Miller filed for divorce in June 2021. During the divorce proceedings, her husband, Doctor Mark Miller, agreed to submit the matter to arbitration if Elizabeth would waive her spousal support claims. She did and the issue went to arbitration. After conducting the arbitration, the arbitrator elected to divide the community assets unequally, awarding 60% of the marital assets to Elizabeth and 40% to Mark. The arbitrator also determined that Mark owed Elizabeth retroactive child support. After the arbitrator issued the award, Mark unsuccessfully challenged the award’s validity in the magistrate court. Mark then appealed to the district court, but the district court also ruled against Mark and awarded partial attorney fees to Elizabeth for the appeal. Mark now appeals the district court’s ruling. Specifically, Mark contends that, notwithstanding his agreement to arbitrate, divorce matters cannot be submitted to arbitration 1 because the magistrate and district courts have “[e]xclusive original jurisdiction” of those matters under Idaho Code section 32-715. He also argues that the arbitrator improperly awarded (1) retroactive child support, and (2) an unequal distribution of assets in lieu of spousal support because those issues were not submitted to arbitration. Mark further contends that Elizabeth should not have been awarded attorney fees for his appeal to the district court. Both Mark and Elizabeth seek attorney fees on appeal to this Court.

I. FACTUAL AND PROCEDURAL BACKGROUND Mark and Elizabeth Miller were married in 1994. During the course of their marriage, Mark established a successful ophthalmologist practice, and Elizabeth primarily stayed home to care for their eight children. In June of 2021, Elizabeth filed a Petition for Divorce. In her petition, Elizabeth sought child support, spousal maintenance, an equitable division of community property and debts, attorney fees, and child custody as to be mutually agreed by the parties. Mark responded, filing an answer and counterclaim. He sought joint legal and physical custody of their minor children. Mark also sought an equitable division of community income and property, but he requested that the parties pay their own attorney fees and costs. The parties then filed conflicting motions for temporary orders. Most of the issues discussed in these motions have no bearing on this appeal, except for one. Elizabeth moved “[f]or an order requiring [Mark] to pay support . . . .” Mark offered to split his biweekly paycheck with Elizabeth, as well as the balance of a business savings account that contained $250,000. The magistrate court judge presiding over the case at the time described Mark’s offer as “such a good- faith overture that it shows me higher-functioning thinking with regard to what to do temporarily.” Elizabeth accepted Mark’s proposal. Because the parties agreed on this point, both the magistrate court and Elizabeth’s counsel agreed that there was no need to calculate child support at that time. The court then entered a Temporary Order which implemented Mark’s proposal, “so that [the parties] can pay for their reasonable living expenses and separate legal fees.” It took about eighteen months before the parties would finally come to an agreement on custody. The magistrate court judge assigned to the case at that time entered a partial judgment implementing that agreement and retired shortly thereafter. After resolving custody, Elizabeth’s counsel proposed resolving the remaining issues through binding arbitration, something Elizabeth’s counsel had done in other divorce proceedings. Mark was hesitant to accept arbitration,

2 but he agreed to stipulate to arbitration if Elizabeth agreed to waive her claim to spousal support, which she did. The parties then signed an arbitration agreement. The new magistrate court judge assigned to the case entered an order giving effect to that stipulation. After the parties’ original arbitrator withdrew, Elizabeth and Mark found another mutually acceptable arbitrator and signed a second arbitration agreement. This second agreement was virtually identical to the first agreement. Like its predecessor, the second agreement referred the case and all “pending claims” to arbitration. The agreement also provided additional terms that were to govern the arbitration: 1. GOVERNING LAW. Idaho law and Uniform Arbitration Act (Idaho Code § 7-901-et seq) shall govern in this matter 2. EXPLANATION OF AWARD. The Arbitrator shall provide a written explanation of the award. 3. PAYMENT OF ARBITRATOR. The parties agree that the Arbitrator shall be paid her hourly rate and the cost shall be equally shared between the parties as determined by the Arbitrator. 4. SPOUSAL MAINTENANCE. The Petitioner agrees that she waives any claim to spousal maintenance. 5. BEFORE THE ARBITRATOR. The issues before the Arbitrator include the income amounts to be used for child support, setting child support amount, valuation, characterization and allocation of the property and debts in this divorce action. 6. BINDING. The Arbitrator’s decision shall be binding and final. No appeals, other than jurisdiction or fraud, shall be permitted. The award shall be confirmed by this [c]ourt. The magistrate court then entered another order reflecting this new agreement, and the parties proceeded to three days of arbitration. At the conclusion of the arbitration, the arbitrator issued a written award. The arbitrator determined that an unequal distribution of the community property was appropriate and granted 60% of the community’s assets to Elizabeth. In support of this conclusion, the arbitrator noted the long duration of the marriage, Elizabeth’s advanced age, Mark’s high income and extensive assets, Elizabeth’s lack of work history, the age and number of children still living at home, Elizabeth’s lack of employment options, and Elizabeth’s consistent role as a homemaker. The arbitrator also determined that an unequal distribution was appropriate based on the disparate Social Security benefits between the parties.

3 The arbitrator then set the amount of child support that Elizabeth would receive. Using the child support guidelines found in the Idaho Rules of Family Law Procedure, the arbitrator awarded Elizabeth child support for the children still living at home. Importantly, the arbitrator determined that the child support should be paid retroactively from the date the divorce action commenced. The arbitrator also determined that Mark was responsible for paying the extracurricular expenses of the children, including some of the expenses of the adult children. The arbitrator concluded the award by requiring Mark to pay all of Elizabeth’s remaining attorney fees and costs.

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Miller v. Miller, Counsel Stack Legal Research, https://law.counselstack.com/opinion/miller-v-miller-idaho-2026.