Background
Commonwealth Edison Company, which provides electric-delivery service to more than four million Illinois customers, filed a multiyear integrated grid plan and a proposed four-year rate plan under the Public Utilities Act as amended by the Climate and Equitable Jobs Act. The Illinois Commerce Commission rejected ComEd’s initial grid plan but approved its rate plan with modifications, later approving a refiled grid plan.
ComEd and International Brotherhood of Electrical Workers, AFL-CIO, Local Union 15 sought administrative review of several Commission orders. The consolidated appeals challenged the Commission’s treatment of three principal ratemaking issues: ComEd’s authorized return on equity, its claimed pension asset, and the capital structure used to determine its revenue requirement.
The Court’s Holding
The appellate court affirmed the Commission’s orders. It upheld the Commission’s authorization of an 8.905% return on equity for each year of the rate plan. The Commission permissibly averaged an 8.48% nonconstant-growth discounted-cash-flow estimate and a revised 9.33% capital-asset-pricing-model estimate, while adjusting or rejecting other models and inputs based on the evidentiary record and prior Commission practice.
The court also upheld the denial of a return on ComEd’s claimed pension asset. Evidence supported the Commission’s finding that the regulatory debt associated with ComEd’s earlier $803 million pension contribution had fully diminished before the new rates took effect, and ComEd did not sufficiently establish that shareholders funded the remaining pension asset.
Finally, the court sustained the Commission’s rejection of ComEd’s proposed capital structure and its imputation of a 50% common-equity ratio throughout the rate-plan period. The Commission applied the proper legal standard, and substantial evidence supported its findings that the rate plan did not increase ComEd’s risk, that a 50% equity ratio would not impair its financial strength, and that its affiliation with parent company Exelon had inflated its equity ratio.
Key Takeaways
- The Commission may choose among supported financial models and adjust their inputs when setting a utility’s return on equity, provided its decision is consistent with governing law and supported by the record.
- A utility seeking a return on a pension asset must adequately trace the asset to shareholder funding; general assertions and evidence that contributions came from operating cash are insufficient.
- Although the statute requires consideration of a utility’s actual capital structure, a common-equity ratio above 50% requires specific Commission approval and must be justified as prudent and reasonable.
Why It Matters
The decision confirms the Commission’s substantial discretion in implementing Illinois’s multiyear electric-rate framework, including its authority to account for reduced regulatory risk when setting returns and capital structure. It also underscores that utilities bear the evidentiary burden of proving both the reasonableness of proposed rates and the shareholder-funded character of assets on which they seek a return.