Benefit Plans, Reconciliation of Benefit Obligations and Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in benefit obligation [Roll Forward]
Actuarial loss	$ (89)	$ 236
Pension Benefits
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning balance	3,243	3,137
Deconsolidation	(98)
Service cost	3	3	$ 7
Interest cost	70	92	117
Plan participants' contributions
Actuarial loss	(89)	236
Benefits paid from plan assets	(193)	(189)
Settlements and curtailments	(19)	(40)
Foreign exchange	(1)	4
Benefit obligation, ending balance	2,916	3,243	3,137
Change in plan assets [Roll Forward]
Fair value of plan assets, beginning balance	2,739	2,576
Deconsolidation	(85)
Actual return on plan assets	355	327
Company contributions	20	61
Plan participants' contributions
Benefits paid from plan assets	(193)	(189)
Settlements	(19)	(40)
Foreign exchange	(1)	4
Fair value of plan assets, ending balance	2,816	2,739	2,576
Funded status	(100)	(504)
Other Postretirement Benefits
Change in benefit obligation [Roll Forward]
Benefit obligation, beginning balance	51	52
Deconsolidation
Service cost
Interest cost	1	2	2
Plan participants' contributions	4	4
Actuarial loss	(2)	3
Benefits paid from plan assets	(10)	(10)
Settlements and curtailments
Foreign exchange
Benefit obligation, ending balance	44	51	52
Change in plan assets [Roll Forward]
Fair value of plan assets, beginning balance	96	90
Deconsolidation
Actual return on plan assets		8
Company contributions	3	4
Plan participants' contributions	4	4
Benefits paid from plan assets	(10)	(10)
Settlements
Foreign exchange
Fair value of plan assets, ending balance	93	96	$ 90
Funded status	$ 49	$ 45