Pension and Other Postretirement Employee Benefit Plans (Funded Status of Pension and Postretirement Benefit Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Pension benefit plans
Change in plan assets:
Fair value of plan assets at beginning of year	$ 3,663
Fair value of plan assets at end of year	2,726	$ 3,663
Pension benefit plans | U.S. Pension Benefits
Change in pension benefit obligation:
Benefit obligation at beginning of year	(2,532)	(2,718)
Service cost	0	0
Interest cost	(54)	(44)
Employee/retiree contributions	0	0
Benefits and other expenses paid	178	167
Actuarial gain (loss)	495	63
Amendments, settlements and curtailments	0	0
Foreign exchange rate impact and other	0	0
Benefit obligation at end of year	(1,913)	(2,532)
Change in plan assets:
Fair value of plan assets at beginning of year	2,303	2,125
Actual return on plan assets	(278)	335
Employer contributions	10	10
Employee/retiree contributions	0	0
Amendments and settlements	0	0
Benefits and other expenses paid	(178)	(167)
Foreign exchange rate impact and other	0	0
Fair value of plan assets at end of year	1,857	2,303
Funded status	(56)	(229)
Pension benefit plans | Foreign Plan
Change in pension benefit obligation:
Benefit obligation at beginning of year	(1,944)	(2,161)
Service cost	(39)	(44)
Interest cost	(23)	(19)
Employee/retiree contributions	(7)	(7)
Benefits and other expenses paid	46	59
Actuarial gain (loss)	481	112
Amendments, settlements and curtailments	66	18
Foreign exchange rate impact and other	148	98
Benefit obligation at end of year	(1,272)	(1,944)
Change in plan assets:
Fair value of plan assets at beginning of year	1,360	1,331
Actual return on plan assets	(322)	80
Employer contributions	40	50
Employee/retiree contributions	7	7
Amendments and settlements	(65)	(10)
Benefits and other expenses paid	(46)	(59)
Foreign exchange rate impact and other	(105)	(39)
Fair value of plan assets at end of year	869	1,360
Funded status	(403)	(584)
Other postretirement benefits
Change in pension benefit obligation:
Benefit obligation at beginning of year	(135)	(148)
Service cost	0	0
Interest cost	(3)	(2)
Employee/retiree contributions	(1)	(2)
Benefits and other expenses paid	13	14
Actuarial gain (loss)	20	3
Amendments, settlements and curtailments	0	0
Foreign exchange rate impact and other	0	0
Benefit obligation at end of year	(106)	(135)
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	12	12
Employee/retiree contributions	1	2
Amendments and settlements	0	0
Benefits and other expenses paid	(13)	(14)
Foreign exchange rate impact and other	0	0
Fair value of plan assets at end of year	0	0
Funded status	$ (106)	$ (135)