Shareowners' Equity (Changes In Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance				$ (577)
Other comprehensive income (OCI) before reclassifications - net of deferred taxes		$ 725
Benefit (provision) for income taxes	[1]	48	$ 15	6,164	$ (109)
Other comprehensive income, net of tax	[1]	725	(705)	(1,039)	204
Less: Other comprehensive income (loss) attributable to noncontrolling interests	[1]	(1)	(4)	(24)	1
Accumulated other comprehensive income (loss) ending balance		(1,593)	(831)	(1,593)	(831)
Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		558	1,092	1,010	309
Other comprehensive income (OCI) before reclassifications - net of deferred taxes		45	(241)	(355)	555
Other Comprehensive Income Loss Before Reclassification, Tax		27	(131)	(179)	341
Reclassification from OCI net of deferred taxes		(23)	(19)	(76)	(32)
Benefit (provision) for income taxes		(20)	(15)	(50)	(19)
Other comprehensive income, net of tax		22	(260)	(431)	523
Less: Other comprehensive income (loss) attributable to noncontrolling interests		0	2	0	2
Accumulated other comprehensive income (loss) ending balance		580	830	580	830
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		(2,146)	(656)	(838)	(687)
Other comprehensive income (OCI) before reclassifications - net of deferred taxes		1	(532)	(1,635)	(502)
Other Comprehensive Income Loss Before Reclassification, Tax		16	201	1,355	306
Reclassification from OCI net of deferred taxes		732	(14)	1,039	(8)
Benefit (provision) for income taxes		(628)	1	(779)	124
Other comprehensive income, net of tax		734	(546)	(596)	(510)
Less: Other comprehensive income (loss) attributable to noncontrolling interests		(1)	(6)	(23)	(1)
Accumulated other comprehensive income (loss) ending balance		(1,412)	(1,196)	(1,412)	(1,196)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		(156)	(195)	(172)	(293)
Other comprehensive income (OCI) before reclassifications - net of deferred taxes		(135)	(314)	(651)	(341)
Other Comprehensive Income Loss Before Reclassification, Tax		(27)	(44)	(32)	(6)
Reclassification from OCI net of deferred taxes		99	404	631	529
Benefit (provision) for income taxes		14	27	69	40
Other comprehensive income, net of tax		(36)	90	(20)	188
Less: Other comprehensive income (loss) attributable to noncontrolling interests		0	0	0	0
Accumulated other comprehensive income (loss) ending balance		(192)	(105)	(192)	(105)
Benefit Plans Adj [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		(574)	(371)	(577)	(363)
Benefit (provision) for income taxes		(1)	(2)	(5)	(6)
Other comprehensive income, net of tax		4	11	8	3
Less: Other comprehensive income (loss) attributable to noncontrolling interests		0	0	(1)	0
Net acturial gain (loss) net of deferred taxes		0	7	(4)	(10)
Net actuarial gain loss - deferred tax		2	1	1	(5)
Prior service cost amortization - net of deferred taxes		0	0	(1)	1
Prior service cost amortization - deferred tax		0	0	0	0
Net actuarial loss amortization net of tax		4	4	13	12
Net actuarial loss amortization - deferred tax		1	2	5	6
Accumulated other comprehensive income (loss) ending balance		$ (569)	$ (360)	$ (569)	$ (360)

[1] Amounts may not add due to rounding.