Other Comprehensive Income (Loss) (Schedule Of Components Of Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Equity [Abstract]
Foreign currency translation adjustments, Pre-Tax		$ 290	$ (334)	$ 525	$ (321)
Foreign currency translation adjustments, Tax		1	(1)	1	(1)
Foreign currency translation adjustments, Net of Tax		289	(333)	524	(320)
Unrealized investment gains (losses), Pre-Tax		24	0	19	0
Unrealized investment gains (losses), Tax		10	0	8	0
Unrealized investment gains (losses), Net of Tax		14	0	11	0
Pension/post-retirement plans:
Prior services losses (gains), Pre-Tax	[1]			0	1
Prior service losses (gains), Tax	[1]			0	0
Prior Service losses (gains), Net of Tax	[1]			0	1
Net actuarial loss, Pre-Tax	[1]	42	43	82	84
Net actuarial loss, Tax	[1]	9	12	19	24
Net actuarial loss, Net of Tax	[1]	33	31	63	60
Subtotal, Pre-Tax		42	43	82	85
Subtotal, Tax		9	12	19	24
Subtotal, Net of Tax		33	31	63	61
Effect of remeasurement, Pre-tax		0	0	9	(1)
Effect of remeasurement, Tax		1	0	3	0
Effect of remeasurement, Net of Tax		(1)	0	6	(1)
Effect of curtailment, Pre-Tax		0	3	(1)	3
Effect of curtailment, Tax		0	1	0	1
Effect of curtailment, Net of Tax		0	2	(1)	2
Effect of settlement, Pre-tax				1	1
Effect of settlement, Tax				0	0
Effect of settlement, Net of Tax				1	1
Foreign currency translation adjustment, Pre-Tax		(47)	116	(62)	213
Foreign currency translation adjustment, Tax		(8)	21	(11)	37
Foreign currency translation adjustment, Net of Tax		(39)	95	(51)	176
Other, Pre-Tax		0	1	(1)	0
Other, Tax		0	0	0	0
Other, Net of Tax		0	1	(1)	0
Pension/post-retirement plans losses (gains), Pre-Tax		(5)	163	28	301
Pension/post-retirement plans losses (gains), Tax		2	34	11	62
Pension/post-retirement plans losses (gains), Net of Tax		(7)	129	17	239
Other comprehensive income (loss), before tax		309	(171)	572	(20)
Other comprehensive income (loss), Tax		13	33	20	61
Other comprehensive income (loss), net of tax		$ 296	$ (204)	$ 552	$ (81)

[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.