Employee Benefit Plans - PAC - 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)
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
PAC | Other Postretirement
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	271	264
Employer contributions	0	0
Participant contributions	3	4
Actual return on plan assets	15	25
Benefits paid	(22)	(22)
Ending balance	267	271	264
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	215	219
Service cost	1	1	2
Interest cost	11	11	8
Participant contributions	3	4
Actuarial (gain) loss	(12)	2
Benefits Paid	(22)	(22)
Ending balance	196	215	219
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	267	271	264
Benefit obligation, end of year	196	215	219
Funded status	71	56
Other assets	71	56
Other current liabilities	0	0
Other long-term liabilities	0	0
Amounts recognized	71	56
PAC | Supplemental Employee Retirement Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Accumulated benefit obligation, end of year	38	41
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Rabbi trusts	76	68
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
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
U.S. | PAC | Pension
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	764	758
Employer contributions	4	4
Participant contributions	0	0
Actual return on plan assets	31	73
Benefits paid	(71)	(71)
Ending balance	728	764	758
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	740	746
Service cost	0	0	0
Interest cost	37	39	29
Participant contributions	0	0
Actuarial (gain) loss	(23)	26
Benefits Paid	(71)	(71)
Ending balance	683	740	746
Accumulated benefit obligation, end of year	683	740
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	728	764	758
Benefit obligation, end of year	683	740	$ 746
Funded status	45	24
Other assets	83	65
Other current liabilities	(4)	(4)
Other long-term liabilities	(34)	(37)
Amounts recognized	$ 45	$ 24