Employee Benefit Plans and Postretirement Benefits - Defined Benefit Pension Plans by Geographical Area (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 16, 2018	Dec. 31, 2023	Dec. 31, 2022
Change in benefit obligations:
Plan amendments	$ 527
Change in the fair value of plan assets:
Beginning plan assets		$ 1,037
Ending plan assets		1,107	$ 1,037
U.S.
Change in benefit obligations:
Beginning benefit obligation		128	174
Service cost		2	3
Interest cost		7	5
Plan participants’ contributions		0	0
Actuarial loss (gain)		7	(51)
Gross benefits paid		(5)	(3)
Plan amendments		0	0
Currency translation adjustments and other		0	0
Ending benefit obligation		139	128
Change in the fair value of plan assets:
Beginning plan assets		159	205
Actual return on plan assets		6	(43)
Employer contributions		0	0
Plan participants’ contributions		0	0
Gross benefits paid		(4)	(3)
Currency translation adjustments and other		0	0
Ending plan assets		161	159
Funded status:		22	31
U.K.
Change in benefit obligations:
Beginning benefit obligation		770	1,288
Service cost		0	0
Interest cost		38	20
Plan participants’ contributions		0	0
Actuarial loss (gain)		17	(360)
Gross benefits paid		(48)	(48)
Plan amendments		4	0
Currency translation adjustments and other		44	(130)
Ending benefit obligation		825	770
Change in the fair value of plan assets:
Beginning plan assets		650	1,057
Actual return on plan assets		36	(292)
Employer contributions		31	39
Plan participants’ contributions		0	0
Gross benefits paid		(48)	(48)
Currency translation adjustments and other		38	(106)
Ending plan assets		707	650
Funded status:		(118)	(120)
Germany
Change in benefit obligations:
Beginning benefit obligation		108	157
Service cost		0	0
Interest cost		4	1
Plan participants’ contributions		0	0
Actuarial loss (gain)		12	(29)
Gross benefits paid		(11)	(11)
Plan amendments		0	0
Currency translation adjustments and other		4	(10)
Ending benefit obligation		117	108
Change in the fair value of plan assets:
Beginning plan assets		4	4
Actual return on plan assets		0	0
Employer contributions		0	0
Plan participants’ contributions		0	0
Gross benefits paid		0	0
Currency translation adjustments and other		0	0
Ending plan assets		4	4
Funded status:		(113)	(104)
Other
Change in benefit obligations:
Beginning benefit obligation		169	224
Service cost		7	8
Interest cost		5	1
Plan participants’ contributions		1	1
Actuarial loss (gain)		17	(36)
Gross benefits paid		(16)	(15)
Plan amendments		0	0
Currency translation adjustments and other		10	(14)
Ending benefit obligation		193	169
Change in the fair value of plan assets:
Beginning plan assets		166	208
Actual return on plan assets		9	(22)
Employer contributions		10	7
Plan participants’ contributions		1	1
Gross benefits paid		(16)	(14)
Currency translation adjustments and other		7	(14)
Ending plan assets		177	166
Funded status:		$ (16)	$ (3)