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Benefit Plans - Schedule of Estimated Future Benefit Payments Expected to be Paid (Details)
$ in Millions
Dec. 31, 2025
USD ($)
Pension benefits  
Estimated future benefit payments  
2026 $ 478
2027 467
2028 456
2029 452
2030 421
2031-2035 1,804
Total benefit payments 4,078
Postretirement benefits  
Estimated future benefit payments  
2026 20
2027 18
2028 16
2029 15
2030 13
2031-2035 48
Total benefit payments $ 130