Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Equity [Abstract]
Foreign currency translation adjustments, Pre-Tax		$ 96	$ 228
Foreign currency translation adjustments, Tax		2	5
Foreign currency translation adjustments, Net of Tax		94	223
Pension/post-retirement plans:
Prior services credits, Pre-Tax	[1]	(1)	(1)
Prior service credits, Tax	[1]	0	0
Prior service credits, Net of Tax	[1]	(1)	(1)
Net actuarial loss, Pre-Tax	[1]	26	37
Net actuarial loss, Tax	[1]	6	7
Net actuarial loss, Net of Tax	[1]	20	30
Effect of settlement, Pre-tax	[1]	4	0
Effect of settlement, Tax	[1]	1	0
Effect of settlement, Net of Tax	[1]	3	0
Subtotal, Pre-Tax		29	36
Subtotal, Tax		7	7
Subtotal, Net of Tax		22	29
Foreign currency translation adjustment, Pre-Tax		(72)	(120)
Foreign currency translation adjustment, Tax		(13)	(20)
Foreign currency translation adjustment, Net of Tax		(59)	(100)
Pension/post-retirement plans (losses) gains, Pre-Tax		(43)	(84)
Pension/post-retirement plans (losses) gains, Tax		(6)	(13)
Pension/post-retirement plans (losses) gains, Net of Tax		(37)	(71)
Other comprehensive income, before tax		53	144
Other comprehensive (loss) income, Tax		(4)	(8)
Other comprehensive income, net of tax		$ 57	$ 152

[1] Components of net periodic pension cost are included in compensation and benefits in the Consolidated Statements of Income. Tax on prior service gains and net actuarial losses is included in income tax expense.