Employee Benefit Plans - Schedule of Components of Retirement Plan Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Total pre-tax comprehensive loss (income)	$ (15)	$ 88	$ (140)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost (benefits earned during the period)	$ 46	$ 41	$ 48
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Interest cost	$ 79	$ 76	$ 48
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Expected return on plan assets	$ (89)	$ (83)	$ (79)
Settlement charges	2	0	0
Curtailments	$ 0	$ 0	$ (2)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Amortization of actuarial loss	$ 5	$ 3	$ 17
Amortization of prior service cost (credit)	(20)	(20)	(20)
Net periodic defined benefit plan expense	23	17	12
Defined contribution plans	76	73	67
Total retirement plan expense	99	90	79
Net actuarial loss (gain)	(38)	46	(88)
Prior service cost	26	19	20
Total pre-tax comprehensive loss (income)	(12)	65	(68)
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost (benefits earned during the period)	$ 0	$ 0	$ 1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Interest cost	$ 5	$ 6	$ 3
Expected return on plan assets	0	0	0
Settlement charges	0	0	0
Curtailments	$ 0	$ 0	$ 0
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Amortization of actuarial loss	$ 3	$ 2	$ 5
Amortization of prior service cost (credit)	0	0	0
Net periodic defined benefit plan expense	8	8	9
Defined contribution plans	0	0	0
Total retirement plan expense	8	8	9
Net actuarial loss (gain)	(5)	4	(29)
Prior service cost	0	0	0
Total pre-tax comprehensive loss (income)	$ (5)	$ 4	$ (29)