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Employee Retirement Benefits
3 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Employee Retirement Benefits Employee Retirement Benefits
NEE sponsors a qualified noncontributory defined benefit pension plan for substantially all employees of NEE and its subsidiaries and sponsors a contributory postretirement plan for other benefits for retirees of NEE and its subsidiaries meeting certain eligibility requirements.

The components of net periodic cost (income) for the plans are as follows:
 Pension BenefitsPostretirement Benefits
 Three Months Ended March 31,Three Months Ended March 31,
 2023202220232022
 (millions)
Service cost$16 $22 $ $— 
Interest cost33 19 3 
Expected return on plan assets(98)(91) — 
Amortization of actuarial loss —  
Amortization of prior service benefit —  (1)
Net periodic cost (income) at NEE$(49)$(50)$3 $
Net periodic cost (income) allocated to FPL$(32)$(34)$2 $