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Employee Benefit Plans | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Compensation and Employee Benefit Plans | Employee Benefit Plans Net periodic cost (benefit) for the FPU Pension Plan for the three and nine months ended September 30, 2025 and 2024 is set forth in the following table:
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
(in millions) |  |  |  |  |  |  |  |
Interest cost |  | $ | 0.6 |  |  | $ | 0.6 |  |  | $ | 1.8 |  |  | $ | 1.8 |
Expected return on plan assets |  | (0.7) |  |  | (0.8) |  |  | (2.1) |  |  | (2.2) |
Amortization of net loss |  | 0.1 |  |  | 0.1 |  |  | 0.1 |  |  | 0.2 |
Total net periodic benefit |  | $ | — |  |  | $ | (0.1) |  |  | $ | (0.2) |  |  | $ | (0.2) |
Net periodic costs for our other pension and postretirement benefit plans were not material for the three and nine months ended September 30, 2025 and 2024. In addition, total amounts reclassified from accumulated other comprehensive income (loss) and regulatory assets related to all pension and postretirement benefit plans were not material during the three and nine months ended September 30, 2025 and 2024. The components of our net periodic costs (benefits) have been recorded or reclassified to other expense, net in the condensed consolidated statements of income. Pursuant to their respective regulatory orders, FPU and Chesapeake Utilities continue to record a portion of their unrecognized postretirement benefit costs related to their regulated operations as a regulatory asset. The portion of the unrecognized pension and postretirement benefit costs related to FPU’s unregulated operations and Chesapeake Utilities' operations is recorded to accumulated other comprehensive income (loss). During the three and nine months ended September 30, 2025, there were no contributions to the FPU Pension Plan and we do not expect to contribute to the FPU Pension Plan during 2025. The Chesapeake SERP, the Chesapeake Postretirement Plan and the FPU Medical Plan are unfunded and are expected to be paid out of our general funds. Cash benefits paid under these other postretirement benefit plans for the three and nine months ended September 30, 2025 were not material. We expect to pay total cash benefits of approximately $0.3 million for these other postretirement benefit plans in 2025. Non-Qualified Deferred Compensation Plan Members of our BOD and officers of the Company are eligible to participate in the Non-Qualified Deferred Compensation Plan. Directors can elect to defer any portion of their cash or stock compensation and officers can defer up to 80 percent of their base compensation, cash bonuses or any amount of their stock bonuses (net of required withholdings). Officers may receive a matching contribution on their cash compensation deferrals up to 6 percent of their compensation, provided it does not duplicate a match they receive in the Retirement Savings Plan. All obligations arising under the Non-Qualified Deferred Compensation Plan are payable from our general assets, although we have established a Rabbi Trust to informally fund the plan. Deferrals of cash compensation may be invested by the participants in various mutual funds (the same options that are available in the Retirement Savings Plan). The participants are credited with gains or losses on those investments. Assets held in the Rabbi Trust, recorded as Investments on the condensed consolidated balance sheets, had a fair value of $16.8 million and $14.4 million at September 30, 2025 and December 31, 2024, respectively. The assets of the Rabbi Trust are at all times subject to the claims of our general creditors.

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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/715/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 712 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/712/tableOfContent Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 710 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/710/tableOfContent Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/718/tableOfContent + Details
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