Accumulated Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, net of tax	$ (849)	$ 376
Other adjustments. before tax			$ (11)
Other adjustments, tax			(2)
Other adjustments, net of tax			(9)
Other comprehensive income (loss), before tax	(557)	840	(225)
Other comprehensive income (loss), tax	182	305	(170)
Other comprehensive (loss) income, net of tax	(739)	535	(55)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	(1,198)	(389)	559
Other comprehensive income (loss), before reclassification, tax	22	0	0
Other comprehensive income (loss), before reclassification, net of tax	(1,220)	(389)	559
Other comprehensive (loss) income, net of tax	(1,220)	(389)
Pension and Post-Retirement Plans Losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, net of tax	371	765
Reclassification from AOCI, before tax	150	213	162
Reclassification from AOCI, tax	38	54	37
Reclassification from AOCI, net of tax	112	159	125
Other comprehensive income (loss), before tax	641	1,229	(784)
Other comprehensive income (loss), tax	160	305	(170)
Other comprehensive (loss) income, net of tax	481	924	(614)
Prior service credits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before tax	(2)	(2)	(2)
Reclassification from AOCI, tax	0	0	(1)
Reclassification from AOCI, net of tax	(2)	(2)	(1)
Net actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before tax	150	208	161
Reclassification from AOCI, tax	38	52	37
Reclassification from AOCI, net of tax	112	156	124
Effect of curtailment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before tax		2
Reclassification from AOCI, tax		1
Reclassification from AOCI, net of tax		1
Effect of settlement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before tax	2	5	3
Reclassification from AOCI, tax	0	1	1
Reclassification from AOCI, net of tax	2	4	2
Net gains arising during period
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	203	1,003	(772)
Other comprehensive income (loss), before reclassification, tax	51	249	(177)
Other comprehensive income (loss), before reclassification, net of tax	152	754	(595)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	285	19	(163)
Other comprehensive income (loss), before reclassification, tax	71	4	(28)
Other comprehensive income (loss), before reclassification, net of tax	214	15	$ (135)
Other adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	3	(6)
Other comprehensive income (loss), before reclassification, tax	0	(2)
Other comprehensive income (loss), before reclassification, net of tax	$ 3	$ (4)