Other Comprehensive (Loss) Income (Schedule Of Components Of Comprehensive (Loss) Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax	$ (366)	$ (614)	$ (144)	$ (1,325)
Other comprehensive income (loss), tax	39	71	2	148
Other comprehensive loss, net of tax	(405)	(685)	(146)	(1,473)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	(473)	(895)	(131)	(1,928)
Other comprehensive income (loss), before reclassification, tax	12	0	5	0
Other comprehensive income (loss), before reclassification, net of tax	(485)	(895)	(136)	(1,928)
Reclassification from AOCI, net of tax	0	0	0	0
Other comprehensive loss, net of tax	(485)	(895)	(136)	(1,928)
Prior service credits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before Tax			(1)	(1)
Reclassification from AOCI, tax			0	0
Reclassification from AOCI, net of tax			(1)	(1)
Net actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before Tax	5	37	15	114
Reclassification from AOCI, tax	1	9	4	29
Reclassification from AOCI, net of tax	4	28	11	85
Pension/post-retirement plans gains
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, net of tax	76	182	(20)	371
Reclassification from AOCI, before Tax	5	37	14	113
Reclassification from AOCI, tax	1	9	4	29
Reclassification from AOCI, net of tax	4	28	10	84
Other comprehensive income (loss), before tax	107	281	(13)	603
Other comprehensive income (loss), tax	27	71	(3)	148
Other comprehensive loss, net of tax	80	210	(10)	455
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	102	247	(20)	499
Other comprehensive income (loss), before reclassification, tax	26	63	(5)	123
Other comprehensive income (loss), before reclassification, net of tax	76	184	(15)	376
Effect of remeasurement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	0	(2)	0	8
Other comprehensive income (loss), before reclassification, tax	0	0	0	1
Other comprehensive income (loss), before reclassification, net of tax	0	(2)	0	7
Effect of settlement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax			0	2
Other comprehensive income (loss), before reclassification, tax			0	0
Other comprehensive income (loss), before reclassification, net of tax			0	2
Other adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	0	(1)	(7)	(19)
Other comprehensive income (loss), before reclassification, tax	0	(1)	(2)	(5)
Other comprehensive income (loss), before reclassification, net of tax	$ 0	$ 0	$ (5)	$ (14)