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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, 2023
Dec. 31, 2022
Dec. 31, 2021
Pension Benefits      
Components of net benefit cost (credit):      
Service cost $ 55 $ 55 $ 53
Interest cost 107 57 45
Expected return on assets (117) (142) (133)
Amortization of prior service cost (credit) 1 1 0
Amortization of net actuarial loss (gain) 35 29 52
Settlement loss 46 0 0
Net benefit cost (credit) 127 0 17
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss:      
Net loss (gain) arising during period 10 (11) (127)
Amortization or settlement recognition of net actuarial (loss) gain (81) (29) (52)
Amortization of prior service (cost) credit (1) (1) 0
Total recognized in total other comprehensive (income) loss(a) (72) (41) (179)
Total recognized in net benefit cost (credit) and other comprehensive (income) loss 55 (41) (162)
Pension Benefits | Other Plans      
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss:      
Total recognized in total other comprehensive (income) loss(a)   4 3
OPEB      
Components of net benefit cost (credit):      
Service cost 1 1 1
Interest cost 10 5 4
Expected return on assets (13) (17) (16)
Amortization of prior service cost (credit) (3) (3) (5)
Amortization of net actuarial loss (gain) (16) (18) (17)
Settlement loss 0 0 0
Net benefit cost (credit) (21) (32) (33)
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss:      
Net loss (gain) arising during period (30) 24 (40)
Amortization or settlement recognition of net actuarial (loss) gain 16 17 17
Amortization of prior service (cost) credit 1 2 3
Total recognized in total other comprehensive (income) loss(a) (13) 43 (20)
Total recognized in net benefit cost (credit) and other comprehensive (income) loss $ (34) $ 11 $ (53)