Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before tax	$ (628)	$ 48	$ (711)	$ (37)
Other comprehensive income (loss), tax	56	4	77	6
Other comprehensive (loss) income, net of tax	(684)	44	(788)	(43)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	(864)	24	(1,033)	(67)
Other comprehensive income (loss), before reclassification, tax	0	0	0	0
Other comprehensive income (loss), before reclassification, net of tax	(864)	24	(1,033)	(67)
Reclassification from AOCI, net of tax	0	0	0	0
Other comprehensive (loss) income, net of tax	(864)	24	(1,033)	(67)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, net of tax	154	(16)	189	(52)
Reclassification from AOCI, before Tax	37	51	76	103
Reclassification from AOCI, tax	11	15	20	27
Reclassification from AOCI, net of tax	26	36	56	76
Other comprehensive income (loss), before tax	236	24	322	30
Other comprehensive income (loss), tax	56	4	77	6
Other comprehensive (loss) income, net of tax	180	20	245	24
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	38	52	77	104
Reclassification from AOCI, tax	11	15	20	27
Reclassification from AOCI, net of tax	27	37	57	77
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	187	(44)	252	(81)
Other comprehensive income (loss), before reclassification, tax	44	(12)	60	(20)
Other comprehensive income (loss), before reclassification, net of tax	143	(32)	192	(61)
Effect of remeasurement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	10	15	10	13
Other comprehensive income (loss), before reclassification, tax	1	1	1	1
Other comprehensive income (loss), before reclassification, net of tax	9	14	9	12
Effect of settlement
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax	2	2	2	2
Other comprehensive income (loss), before reclassification, tax	0	0	0	0
Other comprehensive income (loss), before reclassification, net of tax	$ 2	$ 2	2	2
Other adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassification, before tax			(18)	(7)
Other comprehensive income (loss), before reclassification, tax			(4)	(2)
Other comprehensive income (loss), before reclassification, net of tax			$ (14)	$ (5)