Other Comprehensive (Loss) Income (Schedule Of Components Of Comprehensive (Loss) Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax	$ 161	$ (628)	$ 222	$ (711)
Other comprehensive income (loss), tax	(18)	56	(37)	77
Other comprehensive income (loss), net of tax	179	(684)	259	(788)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	223	(864)	342	(1,033)
Other comprehensive income (loss), before reclassification, tax	(1)	0	(7)	0
Other comprehensive income (loss), before reclassification, net of tax	224	(864)	349	(1,033)
Reclassification from AOCI, net of tax	0	0	0	0
Other comprehensive income (loss), net of tax	224	(864)	349	(1,033)
Prior service credits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before Tax	(1)	(1)	(1)	(1)
Reclassification from AOCI, tax	0	0	0	0
Reclassification from AOCI, net of tax	(1)	(1)	(1)	(1)
Net actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from AOCI, before Tax	5	38	10	77
Reclassification from AOCI, tax	1	11	3	20
Reclassification from AOCI, net of tax	4	27	7	57
Pension/post-retirement plans (losses) gains
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, net of tax	(48)	154	(96)	189
Reclassification from AOCI, before Tax	4	37	9	76
Reclassification from AOCI, tax	1	11	3	20
Reclassification from AOCI, net of tax	3	26	6	56
Other comprehensive income (loss), before tax	(62)	236	(120)	322
Other comprehensive income (loss), tax	(17)	56	(30)	77
Other comprehensive income (loss), net of tax	(45)	180	(90)	245
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	(59)	187	(122)	252
Other comprehensive income (loss), before reclassification, tax	(16)	44	(31)	60
Other comprehensive income (loss), before reclassification, net of tax	(43)	143	(91)	192
Effect of remeasurement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	0	10	0	10
Other comprehensive income (loss), before reclassification, tax	0	1	0	1
Other comprehensive income (loss), before reclassification, net of tax	0	9	0	9
Effect of settlement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	0	2	0	2
Other comprehensive income (loss), before reclassification, tax	0	0	0	0
Other comprehensive income (loss), before reclassification, net of tax	0	2	0	2
Other adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	(7)	0	(7)	(18)
Other comprehensive income (loss), before reclassification, tax	(2)	0	(2)	(4)
Other comprehensive income (loss), before reclassification, net of tax	$ (5)	$ 0	$ (5)	$ (14)