v3.26.1
Retirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The following tables summarize the Company’s net periodic benefit cost for the three and six months ended June 30, 2026 and 2025:
Puget EnergyQualified
Pension Benefits		SERP
Pension Benefits		Other
Benefits
Three Months Ended June 30,
(Dollars in Thousands)202620252026202520262025
Components of net periodic benefit cost:
Service cost$4,419 $4,206 $— $— $44 $51 
Interest cost8,024 8,054 280 307 102 108 
Expected return on plan assets(14,314)(14,061)— — (73)(73)
Amortization of prior service cost— — — — 9 9 
Amortization of net loss (gain)(609)(1,196)(42)(50)(59)(46)
Net periodic benefit cost$(2,480)$(2,997)$238 $257 $23 $49 
Puget EnergyQualified
Pension Benefits		SERP
Pension Benefits		Other
Benefits
Six Months Ended June 30,
(Dollars in Thousands)202620252026202520262025
Components of net periodic benefit cost:
Service cost$8,839 $8,412 $— $— $89 $102 
Interest cost16,047 16,107 559 613 204 217 
Expected return on plan assets(28,628)(28,122)— — (146)(146)
Amortization of prior service cost— — — — 17 17 
Amortization of net loss (gain)(1,217)(2,391)(83)(99)(119)(91)
Net periodic benefit cost$(4,959)$(5,994)$476 $514 $45 $99 
Puget Sound EnergyQualified
Pension Benefits		SERP
Pension Benefits		Other
Benefits
Three Months Ended June 30,
(Dollars in Thousands)202620252026202520262025
Components of net periodic benefit cost:
Service cost$4,419 $4,206 $— $— $44 $51 
Interest cost8,024 8,054 279 306 102 108 
Expected return on plan assets(14,314)(14,061)— — (73)(72)
Amortization of prior service cost— — — — 9 9 
Amortization of net loss (gain)— — (37)(45)(60)(47)
Net periodic benefit cost$(1,871)$(1,801)$242 $261 $22 $49 
Puget Sound EnergyQualified
Pension Benefits		SERP
Pension Benefits		Other
Benefits
Six Months Ended June 30,
(Dollars in Thousands)202620252026202520262025
Components of net periodic benefit cost:
Service cost$8,839 $8,412 $— $— $89 $102 
Interest cost16,047 16,107 559 613 204 217 
Expected return on plan assets(28,628)(28,122)— — (146)(145)
Amortization of prior service cost— — — — 17 17 
Amortization of net loss (gain)— — (74)(89)(121)(94)
Net periodic benefit cost$(3,742)$(3,603)$485 $524 $43 $97