Pension and Other Postretirement Employee Benefit Plans (Funded Status of Pension and Postretirement Benefit Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Pension Benefits
Change in plan assets:
Fair value of plan assets at beginning of year	$ 2,629
Fair value of plan assets at end of year	2,704	$ 2,629
Pension Benefits | U.S. Pension Benefits
Change in pension benefit obligation:
Benefit obligation at beginning of year	(1,909)	(2,528)
Service cost	0	0
Interest cost	(97)	(54)
Employee/retiree contributions	0	0
Benefits and other expenses paid	155	178
Actuarial (loss) gain	(52)	495
Amendments, settlements and curtailments	45	0
Foreign exchange rate impact and other	0	0
Benefit obligation at end of year	(1,858)	(1,909)
Change in plan assets:
Fair value of plan assets at beginning of year	1,857	2,303
Actual return on plan assets	222	(278)
Employer contributions	10	10
Employee/retiree contributions	0	0
Amendments and settlements	(45)	0
Benefits and other expenses paid	(155)	(178)
Foreign exchange rate impact and other	0	0
Fair value of plan assets at end of year	1,889	1,857
Funded status	31	(52)
Pension Benefits | Foreign Plan
Change in pension benefit obligation:
Benefit obligation at beginning of year	(1,168)	(1,811)
Service cost	(30)	(35)
Interest cost	(46)	(22)
Employee/retiree contributions	(7)	(5)
Benefits and other expenses paid	47	45
Actuarial (loss) gain	(99)	451
Amendments, settlements and curtailments	13	62
Foreign exchange rate impact and other	(59)	147
Benefit obligation at end of year	(1,349)	(1,168)
Change in plan assets:
Fair value of plan assets at beginning of year	772	1,260
Actual return on plan assets	24	(321)
Employer contributions	36	36
Employee/retiree contributions	7	5
Amendments and settlements	(13)	(61)
Benefits and other expenses paid	(47)	(45)
Foreign exchange rate impact and other	36	(102)
Fair value of plan assets at end of year	815	772
Funded status	(534)	(396)
Postretirement Benefits
Change in pension benefit obligation:
Benefit obligation at beginning of year	(101)	(130)
Service cost	0	0
Interest cost	(5)	(3)
Employee/retiree contributions	(1)	(1)
Benefits and other expenses paid	12	13
Actuarial (loss) gain	(3)	20
Amendments, settlements and curtailments	0	0
Foreign exchange rate impact and other	0	0
Benefit obligation at end of year	(98)	(101)
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	11	12
Employee/retiree contributions	1	1
Amendments and settlements	0	0
Benefits and other expenses paid	(12)	(13)
Foreign exchange rate impact and other	0	0
Fair value of plan assets at end of year	0	0
Funded status	$ (98)	$ (101)