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Share-based Compensation and Employee Benefits - Schedule of Expected Payment of Future Benefits and Employer Contributions (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
Contributions expected in 2024 $ 50
Benefit payments expected in:  
2024 190
2025 187
2026 185
2027 179
2028 175
2029 - 2033 777
OPEB  
Defined Benefit Plan Disclosure [Line Items]  
Contributions expected in 2024 0
Benefit payments expected in:  
2024 24
2025 22
2026 21
2027 19
2028 18
2029 - 2033 $ 67