Shareowners' Equity (Changes In Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	$ (577)
Other comprehensive income, net of tax	(1,630)	450
Other comprehensive income (OCI) before reclassifications - net of deferred taxes	(1,630)		450
Less: Other comprehensive income (loss) attributable to noncontrolling interests	(32)	2
Accumulated Other Comprehensive Income (Loss) Ending balance	(2,175)	(586)	(577)
Securities Investment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	1,010	309	309
OCI before reclassification tax	137	251
Reclassification from OCI Tax	(29)	7
Reclassification from OCI net of deferred taxes	(54)	10
Other comprehensive income, net of tax	197	484
Other comprehensive income (OCI) before reclassifications - net of deferred taxes	251	474
Less: Other comprehensive income (loss) attributable to noncontrolling interests	0	0
Accumulated Other Comprehensive Income (Loss) Ending balance	1,207	793
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	(838)	(687)	(687)
OCI before reclassification tax	1,539	73
Reclassification from OCI Tax	(1)	124
Reclassification from OCI net of deferred taxes	3	2
Other comprehensive income, net of tax	(1,847)	(84)
Other comprehensive income (OCI) before reclassifications - net of deferred taxes	(1,850)	(86)
Less: Other comprehensive income (loss) attributable to noncontrolling interests	(32)	2
Accumulated Other Comprehensive Income (Loss) Ending balance	(2,653)	(773)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	(172)	(293)	(293)
OCI before reclassification tax	(59)	69
Reclassification from OCI Tax	119	(4)
Reclassification from OCI net of deferred taxes	873	(61)
Other comprehensive income, net of tax	10	68
Other comprehensive income (OCI) before reclassifications - net of deferred taxes	(863)	129
Less: Other comprehensive income (loss) attributable to noncontrolling interests	0	0
Accumulated Other Comprehensive Income (Loss) Ending balance	(162)	(225)
Benefit Plans Adj [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	(577)	(363)	(363)
Other comprehensive income, net of tax	10	(18)
Less: Other comprehensive income (loss) attributable to noncontrolling interests	0	0
Net actuarial gain loss - deferred tax	(3)	(8)
Net acturial gain (loss) net of deferred taxes	5	(22)
Net actuarial loss amortization - deferred tax	2	2
Net actuarial loss amortization net of tax	5	4
Accumulated Other Comprehensive Income (Loss) Ending balance	$ (567)	$ (381)