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Employee Retirement Benefits (Tables)
6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Net periodic benefit (income) cost
The components of net periodic cost (income) for the plans are as follows:
 Pension BenefitsPostretirement BenefitsPension BenefitsPostretirement Benefits
 Three Months Ended June 30,Three Months Ended June 30,Six Months Ended June 30,Six Months Ended June 30,
 20242023202420232024202320242023
 (millions)
Service cost$18 $16 $1 $$36 $32 $1 $
Interest cost33 33 2 66 66 4 
Expected return on plan assets(102)(98) — (204)(196) — 
Special termination benefit(a)
 —  — 28 —  — 
Net periodic cost (income) at NEE$(51)$(49)$3 $$(74)$(98)$5 $
Net periodic cost (income) allocated to FPL$(31)$(32)$2 $$(40)$(64)$4 $
———————————————
(a) Reflects enhanced early retirement benefit.