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Benefit Plans (Tables)
3 Months Ended
Dec. 31, 2023
Retirement Benefits [Abstract]  
Components of TVA's Benefit Plans
The components of net periodic benefit cost and other amounts recognized as changes in regulatory assets for the three months ended December 31, 2023 and 2022, were as follows:
Components of TVA's Benefit Plans(1)
(in millions)
 
For the Three Months Ended December 31
 Pension BenefitsOther Post-Retirement Benefits
 2023202220232022
Service cost$$$$
Interest cost144 142 
Expected return on plan assets(124)(123)— — 
Amortization of prior service credit(22)(22)(4)(4)
Recognized net actuarial loss (gain)25 34 (1)— 
Total net periodic benefit cost as actuarially determined30 40 
Amount expensed due to actions of regulator— 19 — — 
Total net periodic benefit cost$30 $59 $$
Note
(1) The components of net benefit cost other than the service cost component are included in Other net periodic benefit cost on the Consolidated Statements of Operations.