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Retirement Benefits and Trusteed Assets (Benefits Related to Qualified and Non-Qualified Pension Plans Expected to be Paid) (Details) - Pension plan
$ in Millions
Dec. 31, 2025
USD ($)
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2026 $ 326
2027 326
2028 330
2029 326
2030 321
2031-2035 1,599
Total $ 3,228