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Share-based Compensation and Employee Benefits - Schedule of Components of Net Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension Benefits      
Components of net benefit cost (credit):      
Service cost $ 52 $ 55 $ 55
Interest cost 91 107 57
Expected return on assets (106) (117) (142)
Amortization of prior service cost (credit) 0 1 1
Amortization of net actuarial loss (gain) 22 35 29
Settlement loss 0 46 0
Net benefit cost (credit) 59 127 0
Other changes in plan assets and benefit obligations recognized in OCI:      
Net (gain) loss arising during period (132) 10 (11)
Amortization or settlement recognition of net actuarial (loss) gain (22) (81) (29)
Amortization of prior service (cost) credit 0 (1) (1)
Total recognized in OCI(a) (154) (72) (41)
Total recognized in net benefit cost (credit) and OCI (95) 55 (41)
Pension Benefits | Other Plans      
Other changes in plan assets and benefit obligations recognized in OCI:      
Total recognized in OCI(a) 1   4
OPEB      
Components of net benefit cost (credit):      
Service cost 1 1 1
Interest cost 8 10 5
Expected return on assets (14) (13) (17)
Amortization of prior service cost (credit) (3) (3) (3)
Amortization of net actuarial loss (gain) (17) (16) (18)
Settlement loss 0 0 0
Net benefit cost (credit) (25) (21) (32)
Other changes in plan assets and benefit obligations recognized in OCI:      
Net (gain) loss arising during period (6) (30) 24
Amortization or settlement recognition of net actuarial (loss) gain 16 16 17
Amortization of prior service (cost) credit 1 1 2
Total recognized in OCI(a) 11 (13) 43
Total recognized in net benefit cost (credit) and OCI $ (14) $ (34) $ 11