Employee Benefit Plans - PAC - Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Postretirement
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 769	$ 744
Employer contributions	8	14
Participant contributions	8	9
Actual return on plan assets	(122)	53
Settlement	0	0
Benefits paid	(49)	(51)
Ending balance	614	769	$ 744
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	714	758
Service cost	11	12	7
Interest cost	20	19	21
Participant contributions	8	9
Actuarial gain	(155)	(35)
Settlement	0	0
Benefits Paid	(49)	(51)
Ending balance	569	714	758
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	614	769	744
Benefit obligation, end of year	569	714	758
Funded status	45	55
Other assets	52	60
Other current liabilities	0	0
Other long-term liabilities	(7)	(5)
Amounts recognized	45	55
Supplemental Employee Retirement Plan
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Rabbi trusts	300	343
PAC | Other Postretirement
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	324	327
Employer contributions	0	1
Participant contributions	5	6
Actual return on plan assets	(42)	14
Settlement	0	0
Benefits paid	(23)	(24)
Ending balance	264	324	327
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	288	307
Service cost	2	2	2
Interest cost	8	7	9
Participant contributions	5	6
Actuarial gain	(61)	(10)
Settlement	0	0
Benefits Paid	(23)	(24)
Ending balance	219	288	307
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	264	324	327
Benefit obligation, end of year	219	288	307
Funded status	45	36
Other assets	45	36
Other current liabilities	0	0
Other long-term liabilities	0	0
Amounts recognized	45	36
PAC | Supplemental Employee Retirement Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Accumulated benefit obligation, end of year	42	54
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Rabbi trusts	61	69
U.S. | Pension
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,795	2,824
Employer contributions	14	13
Participant contributions	0	0
Actual return on plan assets	(491)	234
Settlement	(164)	(134)
Benefits paid	(141)	(142)
Ending balance	2,013	2,795	2,824
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,777	3,077
Service cost	22	30	17
Interest cost	83	78	93
Participant contributions	0	0
Actuarial gain	(524)	(132)
Settlement	(164)	(134)
Benefits Paid	(141)	(142)
Ending balance	2,040	2,777	3,077
Accumulated benefit obligation, end of year	2,003	2,713
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	2,013	2,795	2,824
Benefit obligation, end of year	2,040	2,777	3,077
Funded status	(27)	18
Other assets	125	204
Other current liabilities	(13)	(13)
Other long-term liabilities	(139)	(173)
Amounts recognized	(27)	18
U.S. | PAC | Pension
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,058	1,064
Employer contributions	4	5
Participant contributions	0	0
Actual return on plan assets	(172)	109
Settlement	(67)	(52)
Benefits paid	(65)	(68)
Ending balance	758	1,058	1,064
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	1,048	1,202
Service cost	0	0	0
Interest cost	29	29	36
Participant contributions	0	0
Actuarial gain	(199)	(63)
Settlement	(67)	(52)
Benefits Paid	(65)	(68)
Ending balance	746	1,048	1,202
Accumulated benefit obligation, end of year	746	1,048
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	758	1,058	1,064
Benefit obligation, end of year	746	1,048	$ 1,202
Funded status	12	10
Other assets	53	63
Other current liabilities	(4)	(4)
Other long-term liabilities	(37)	(49)
Amounts recognized	$ 12	$ 10