Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Equity [Abstract]
Foreign currency translation adjustments, Pre-Tax	$ (475)	$ (237)	$ (366)	$ (538)
Foreign currency translation adjustments, Tax	0	5	0	(3)
Foreign currency translation adjustments, Net of Tax	(475)	(242)	(366)	(535)
Pension/post-retirement plans:
Prior services credits, Pre-Tax	(1)	(1)	(2)	(3)
Prior service credits, Tax	(1)	(1)	(1)	(1)
Prior service credits, Net of Tax	0	0	(1)	(2)
Net actuarial loss, Pre-Tax	25	36	77	110
Net actuarial loss, Tax	6	7	18	23
Net actuarial loss, Net of Tax	19	29	59	87
Effect of remeasurements, Pre-Tax	(8)	3	(9)	3
Effect of remeasurements, Tax	(2)	0	(2)	0
Effect of remeasurements, Net of Tax	(6)	3	(7)	3
Effect of settlement, Pre-tax	2	0	6	0
Effect of settlement, Tax	0	0	1	0
Effect of settlement, Net of Tax	2	0	5	0
Subtotal, Pre-Tax	18	38	72	110
Subtotal, Tax	3	6	16	22
Subtotal, Net of Tax	15	32	56	88
Foreign currency translation adjustment, Pre-Tax	64	(15)	30	21
Foreign currency translation adjustment, Tax	8	(2)	4	5
Foreign currency translation adjustment, Net of Tax	56	(13)	26	16
Pension/post-retirement plans (losses) gains, Pre-Tax	82	23	102	131
Pension/post-retirement plans (losses) gains, Tax	11	4	20	27
Pension/post-retirement plans (losses) gains, Net of Tax	71	19	82	104
Other comprehensive (loss), before tax	(393)	(214)	(264)	(407)
Other comprehensive (loss) income, Tax	11	9	20	24
Other comprehensive income (loss), net of tax	$ (404)	$ (223)	$ (284)	$ (431)