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Employee Benefit Plans - PAC - Contributions and Benefit Payments (Details)
$ in Millions
Dec. 31, 2024
USD ($)
Other Postretirement  
Defined Benefit Plan Disclosure [Line Items]  
2025 $ 53
2026 53
2027 53
2028 51
2029 49
2030-2034 217
Other Postretirement | PAC  
Defined Benefit Plan Disclosure [Line Items]  
Projected benefit payments 0
2025 21
2026 21
2027 21
2028 20
2029 19
2030-2034 82
U.S. | Pension  
Defined Benefit Plan Disclosure [Line Items]  
Projected benefit payments 13
2025 187
2026 183
2027 178
2028 171
2029 166
2030-2034 756
U.S. | Pension | PAC  
Defined Benefit Plan Disclosure [Line Items]  
Projected benefit payments 4
2025 74
2026 71
2027 68
2028 64
2029 61
2030-2034 265
U.S. | Other Postretirement  
Defined Benefit Plan Disclosure [Line Items]  
Projected benefit payments $ 1