Employee Benefit Plans - Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Postretirement
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 665	$ 614
Employer contributions	7	6
Participant contributions	6	8
Actual return on plan assets	63	86
Benefits paid	(50)	(49)
Ending balance	691	665	$ 614
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	565	569
Service cost	7	8	11
Interest cost	29	30	20
Participant contributions	6	8
Actuarial (gain) loss	(45)	(1)
Amendment	0	0
Benefits paid	(50)	(49)
Ending balance	512	565	569
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	691	665	614
Benefit obligation, end of year	512	565	569
Funded status	179	100
Other assets	183	104
Other current liabilities	0	0
Other long-term liabilities	(4)	(4)
Amounts recognized	179	100
Supplemental Employee Retirement Plan
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Rabbi trusts	371	341
Projected benefit obligation	131	141
Accumulated benefit obligation	131	141
U.S. | Pension
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,069	2,013
Employer contributions	13	14
Participant contributions	0	0
Actual return on plan assets	105	219
Benefits paid	(177)	(177)
Ending balance	2,010	2,069	2,013
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,050	2,040
Service cost	14	15	22
Interest cost	105	110	83
Participant contributions	0	0
Actuarial (gain) loss	(57)	62
Amendment	(3)	0
Benefits paid	(177)	(177)
Ending balance	1,932	2,050	2,040
Accumulated benefit obligation, end of year	1,900	2,013
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	2,010	2,069	2,013
Benefit obligation, end of year	1,932	2,050	2,040
Funded status	78	19
Other assets	209	160
Other current liabilities	(13)	(13)
Other long-term liabilities	(118)	(128)
Amounts recognized	78	19
United Kingdom | Pension
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,402	1,363
Employer contributions	12	13
Participant contributions	1	1
Actual return on plan assets	(71)	52
Benefits paid	(80)	(97)
Foreign currency exchange rate changes	(22)	70
Ending balance	1,242	1,402	1,363
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	1,219	1,175
Service cost	6	6	14
Interest cost	54	57	35
Participant contributions	1	1
Actuarial (gain) loss	(107)	1
Amendment	0	16
Benefits paid	(80)	(97)
Foreign currency exchange rate changes	(19)	60
Ending balance	1,074	1,219	1,175
Accumulated benefit obligation, end of year	970	1,103
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	1,242	1,402	1,363
Benefit obligation, end of year	1,074	1,219	$ 1,175
Funded status	168	183
Other assets	$ 168	$ 183