Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Equity [Abstract]
Foreign currency translation adjustments, Pre-Tax	$ 13	$ (529)	$ 109	$ (301)
Foreign currency translation adjustments, Tax	(2)	(13)	0	(8)
Foreign currency translation adjustments, Net of Tax	15	(516)	109	(293)
Pension/post-retirement plans:
Prior services credits, Pre-Tax	0	(1)	(1)	(2)
Prior service credits, Tax	0	0	0	0
Prior service credits, Net of Tax	0	(1)	(1)	(2)
Net actuarial loss, Pre-Tax	26	37	52	74
Net actuarial loss, Tax	6	9	12	16
Net actuarial loss, Net of Tax	20	28	40	58
Effect of remeasurements, Pre-Tax	(1)	0	(1)	0
Effect of remeasurements, Tax	0	0	0	0
Effect of remeasurements, Net of Tax	(1)	0	(1)	0
Effect of settlement, Pre-tax			4	0
Effect of settlement, Tax			1	0
Effect of settlement, Net of Tax			3	0
Subtotal, Pre-Tax	25	36	54	72
Subtotal, Tax	6	9	13	16
Subtotal, Net of Tax	19	27	41	56
Foreign currency translation adjustment, Pre-Tax	38	156	(34)	36
Foreign currency translation adjustment, Tax	9	27	(4)	7
Foreign currency translation adjustment, Net of Tax	29	129	(30)	29
Pension/post-retirement plans (losses) gains, Pre-Tax	63	192	20	108
Pension/post-retirement plans (losses) gains, Tax	15	36	9	23
Pension/post-retirement plans (losses) gains, Net of Tax	48	156	11	85
Other comprehensive income (loss), before tax	76	(337)	129	(193)
Other comprehensive (loss) income, Tax	13	23	9	15
Other comprehensive income, net of tax	$ 63	$ (360)	$ 120	$ (208)