Shareowners' Equity and Noncontrolling Interest (Reclass and Changes in Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	$ (2,403)	$ (6,000)	$ (2,403)	$ (6,000)	$ (2,941)	$ (2,880)	$ (5,867)	$ (5,448)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	464	(237)	332	(794)
Amounts reclassified, pretax	111	179	212	389
Tax (benefit) expense reclassified	(359)	(645)	(926)	(1,063)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	(43)	(100)	(43)	(100)	(129)	(79)	(66)	3
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	80	(46)	15	(120)
Amounts reclassified, pretax	13	15	31	21
Tax (benefit) expense reclassified	(7)	(3)	(10)	(4)
Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Tax (benefit) expense reclassified	(37)	(75)	(67)	(147)
Accumulated Translation Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	495	(172)	495	(172)	71	170	76	654
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	424	(212)	322	(794)
Amounts reclassified, pretax	0	(36)	3	(32)
Tax (benefit) expense reclassified	0	0	0	0
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	(3,127)	(5,922)	(3,127)	(5,922)	(3,184)	(3,267)	(6,084)	(6,250)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(12)	18	1	38
Amounts reclassified, pretax	104	227	208	454
Tax (benefit) expense reclassified	(35)	(83)	(69)	(164)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	272	194	272	194	301	296	207	145
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(28)	3	(6)	82
Amounts reclassified, pretax	(6)	(27)	(30)	(54)
Tax (benefit) expense reclassified	$ 5	$ 11	$ 12	$ 21