Benefit Plans (Movements in Other Comprehensive Earnings/Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amortization:
Net loss	$ 127	$ 163	$ 163
Prior service cost/credit	(39)	(41)	(25)
Other expense (income):
Net loss	0	0	10
Prior service cost/credit	0	0	0
Deferred income taxes	(22)	(30)	(37)
Amounts reclassified to net earnings as components of net periodic benefit cost	66	92	111
Other movements during the year:
Net loss	147	624	(448)
Prior service cost/credit	(2)	337	(6)
Deferred income taxes	(35)	(245)	115
Other movements	110	716	(339)
Total movements in other comprehensive earnings/losses	176	808	(228)
Pension [Member]
Amortization:
Net loss	96	131	134
Prior service cost/credit	6	5	5
Other expense (income):
Net loss	0	0	10
Prior service cost/credit	0	0	0
Deferred income taxes	(26)	(35)	(37)
Amounts reclassified to net earnings as components of net periodic benefit cost	76	101	112
Other movements during the year:
Net loss	(183)	465	(268)
Prior service cost/credit	0	(8)	(5)
Deferred income taxes	48	(118)	69
Other movements	(135)	339	(204)
Total movements in other comprehensive earnings/losses	(59)	440	(92)
Postretirement Benefit Plan [Member]
Amortization:
Net loss	18	22	10
Prior service cost/credit	(45)	(46)	(30)
Other expense (income):
Net loss	0	0	0
Prior service cost/credit	0	0	0
Deferred income taxes	7	7	5
Amounts reclassified to net earnings as components of net periodic benefit cost	(20)	(17)	(15)
Other movements during the year:
Net loss	345	157	(162)
Prior service cost/credit	(2)	345	(1)
Deferred income taxes	(87)	(127)	41
Other movements	256	375	(122)
Total movements in other comprehensive earnings/losses	236	358	(137)
Postemployment Retirement Benefits [Member]
Amortization:
Net loss	13	10	19
Prior service cost/credit	0	0	0
Other expense (income):
Net loss	0	0	0
Prior service cost/credit	0	0	0
Deferred income taxes	(3)	(2)	(5)
Amounts reclassified to net earnings as components of net periodic benefit cost	10	8	14
Other movements during the year:
Net loss	(15)	2	(18)
Prior service cost/credit	0	0	0
Deferred income taxes	4	0	5
Other movements	(11)	2	(13)
Total movements in other comprehensive earnings/losses	$ (1)	$ 10	$ 1