Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Equity [Abstract]
Foreign currency translation adjustments, Pre-Tax	$ (941)	$ 96
Foreign currency translation adjustments, Tax	(11)	2
Foreign currency translation adjustments, Net of Tax	(930)	94
Pension/post-retirement plans:
Prior services credits, Pre-Tax	0	(1)
Prior service credits, Tax	0	0
Prior service credits, Net of Tax	0	(1)
Net actuarial loss, Pre-Tax	40	26
Net actuarial loss, Tax	11	6
Net actuarial loss, Net of Tax	29	20
Effect of settlement, Pre-tax	0	4
Effect of settlement, Tax	0	1
Effect of settlement, Net of Tax	0	3
Subtotal, Pre-Tax	40	29
Subtotal, Tax	11	7
Subtotal, Net of Tax	29	22
Foreign currency translation adjustment, Pre-Tax	135	(72)
Foreign currency translation adjustment, Tax	26	(13)
Foreign currency translation adjustment, Net of Tax	109	(59)
Pension/post-retirement plans (losses) gains, Pre-Tax	175	(43)
Pension/post-retirement plans (losses) gains, Tax	37	(6)
Pension/post-retirement plans (losses) gains, Net of Tax	138	(37)
Other comprehensive (loss) income, before tax	(766)	53
Other comprehensive (loss) income, Tax	26	(4)
Other comprehensive (loss) income, net of tax	$ (792)	$ 57