Defined Benefit Postretirement Plans and Defined Contribution Plan - Obligations and Funded Status (Details) - U.S. - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Accumulated benefit obligation	$ 214	$ 260
Change in benefit obligations:
Beginning balance	269	308
Service cost	14	16	$ 19
Interest cost	7	7	9
Actuarial (gain) loss	(46)	(15)
Settlements paid	(21)	(43)
Benefits paid	(5)	(4)
Ending balance	218	269	308
Change in fair value of plan assets:
Beginning balance	192	194
Actual return on plan assets	(27)	13
Employer contributions	22	32
Settlements paid	(21)	(43)
Benefits paid	(5)	(4)
Ending balance	161	192	194
Funded status of plans at December 31
Funded status of plans at December 31	(57)	(77)
Amounts recognized in the consolidated balance sheets:
Current liabilities	(3)	(3)
Noncurrent liabilities	(54)	(74)
Accrued benefit cost	(57)	(77)
Pretax amounts in accumulated other comprehensive loss:
Net loss	24	37
Prior service credit	(8)	(13)
Other Benefits
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Accumulated benefit obligation	53	73
Change in benefit obligations:
Beginning balance	73	80
Service cost	0	0	1
Interest cost	2	2	2
Actuarial (gain) loss	(11)	1
Settlements paid	0	0
Benefits paid	(11)	(10)
Ending balance	53	73	80
Change in fair value of plan assets:
Beginning balance	0	0
Actual return on plan assets	0	0
Employer contributions	11	10
Settlements paid	0	0
Benefits paid	(11)	(10)
Ending balance	0	0	$ 0
Funded status of plans at December 31
Funded status of plans at December 31	(53)	(73)
Amounts recognized in the consolidated balance sheets:
Current liabilities	(8)	(10)
Noncurrent liabilities	(45)	(63)
Accrued benefit cost	(53)	(73)
Pretax amounts in accumulated other comprehensive loss:
Net loss	11	23
Prior service credit	$ (65)	$ (81)