Shareowners' Equity (Changes In Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Stockholders Equity Note [Line Items]
Beginning balance			$ (940)
Other comprehensive income, net of tax	(400)	(173)	(221)	341
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	(19)	(11)	(22)	(1)
Ending balance June 30	(1,139)	(1,754)	(1,139)	(1,754)
Securities Investment [Member]
Stockholders Equity Note [Line Items]
Beginning balance	738	298	673	(33)
Other comprehensive income (OCI) before reclassifications - net of deferred taxes	(605)	167	(661)	473
Reclassification from OCI net of deferred taxes	3	9	125	35
Other comprehensive income, net of tax	(602)	176	(536)	508
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	(2)	(2)	(1)	(1)
Ending balance June 30	138	476	138	476
Stockholders Equity Note Parenthetical [Abstract]
Reclassification from OCI	13	4	107	10
OCI before reclassification tax	(330)	86	(364)	262
Currency Translation Adjustment [Member]
Stockholders Equity Note [Line Items]
Beginning balance	(119)	(274)	(131)	(399)
Other comprehensive income (OCI) before reclassifications - net of deferred taxes	112	(408)	103	(271)
Reclassification from OCI net of deferred taxes	(113)	0	(96)	(3)
Other comprehensive income, net of tax	(1)	(408)	7	(274)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	(18)	(9)	(22)	0
Ending balance June 30	(102)	(673)	(102)	(673)
Stockholders Equity Note Parenthetical [Abstract]
Reclassification from OCI	112	0	79	(5)
OCI before reclassification tax	(120)	57	(311)	12
Cash Flow Hedge [Member]
Stockholders Equity Note [Line Items]
Beginning balance	(654)	(1,029)	(746)	(1,101)
Other comprehensive income (OCI) before reclassifications - net of deferred taxes	252	(336)	155	178
Reclassification from OCI net of deferred taxes	(58)	376	131	(66)
Other comprehensive income, net of tax	194	40	286	112
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	1	0	1	0
Ending balance June 30	(461)	(989)	(461)	(989)
Stockholders Equity Note Parenthetical [Abstract]
Reclassification from OCI	(14)	13	(56)	(22)
OCI before reclassification tax	28	7	84	34
Pension Plans, Defined Benefit [Member]
Stockholders Equity Note [Line Items]
Beginning balance	(723)	(587)	(736)	(563)
Other comprehensive income (OCI) before reclassifications - net of deferred taxes	0	10	2	(21)
Other comprehensive income, net of tax	9	19	22	(5)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	0	0	0	0
Ending balance June 30	(714)	(568)	(714)	(568)
Stockholders Equity Note Parenthetical [Abstract]
Reclassification from OCI	9	9	20	16
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Tax	4	2	7	5
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax	$ 0	$ (4)	$ 18	$ (17)