Employee Benefit Plans - 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) loss	(155)	(35)
Amendment	20	2
Curtailment	0	0
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
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract]
Fair value of plan assets	240	137
Projected benefit obligation	247	142
Supplemental Employee Retirement Plan
Defined Benefit Plans, Supplemental Employee Retirement Plans [Abstract]
Rabbi trusts	300	343
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) loss	(524)	(132)
Amendment	(3)	0
Curtailment	(10)	0
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
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract]
Fair value of plan assets	490	0
Projected benefit obligation	643	186
Fair value of plan assets	0	0
Accumulated benefit obligation	142	185
United Kingdom | Pension
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,363	2,334
Employer contributions	15	28
Participant contributions	1	1
Actual return on plan assets	(671)	148
Settlement	0	(51)
Benefits paid	(109)	(72)
Foreign currency exchange rate changes	(236)	(25)
Ending balance	1,363	2,363	2,334
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	2,003	2,205
Service cost	14	16	16
Interest cost	35	31	40
Participant contributions	1	1
Actuarial (gain) loss	(596)	(105)
Amendment	27	0
Settlement	0	(51)
Benefits paid	(109)	(72)
Foreign currency exchange rate changes	(200)	(22)
Ending balance	1,175	2,003	2,205
Accumulated benefit obligation, end of year	1,060	1,778
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Plan assets at fair value, end of year	1,363	2,363	2,334
Benefit obligation, end of year	1,175	2,003	$ 2,205
Funded status	188	360
Other assets	$ 188	$ 360