v3.26.1
Employee Retirement Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Pension Benefits [Member]    
Net periodic benefit (income) cost [Abstract]    
Service cost $ 19 $ 17
Interest cost 32 34
Expected return on plan assets (106) (103)
Net periodic cost (income) cost (55) (52)
Postretirement Benefits [Member]    
Net periodic benefit (income) cost [Abstract]    
Service cost 0 0
Interest cost 2 2
Expected return on plan assets 0 0
Net periodic cost (income) cost 2 2
Florida Power & Light Company | Pension Benefits [Member]    
Net periodic benefit (income) cost [Abstract]    
Net periodic cost (income) cost (30) (30)
Florida Power & Light Company | Postretirement Benefits [Member]    
Net periodic benefit (income) cost [Abstract]    
Net periodic cost (income) cost $ 2 $ 2