Shareowners' Equity and Noncontrolling Interest (Summary of Changes in Shareowners' Equity and Noncontrolling Interest) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Equity, beginning of period	$ 35,193	$ 28,369	$ 33,219	$ 27,069
Net income	1,952	1,543	5,048	4,544
Total other comprehensive (loss) income	(793)	692	(323)	114
Total comprehensive income for the period	1,159	2,235	4,725	4,658
Common Stock issued under employee plans	154	312	444	764
Common Stock repurchased	(425)	(330)	(1,095)	(1,000)
Dividends on Common Stock	(512)	(465)	(1,538)	(1,395)
Dividends on ESOP Common Stock	(17)	(17)	(53)	(51)
Dividends attributable to noncontrolling interest	(145)	(161)	(245)	(288)
(Purchase) / sale of subsidiary shares from noncontrolling interest	(18)	(73)	(33)	139
Disposition noncontrolling interest	0	(1)	3	(6)
Redeemable noncontrolling interest	0	50	(38)	29
Equity, end of period	35,389	29,919	35,389	29,919
Redeemable noncontrolling interest, beginning of period	146	174	111	238
Redeemable noncontrolling interest, end of period	141	124	141	124
Net income attributable to common shareowners	1,854	1,432	4,747	4,258
Increase in common stock for sale of subsidiary shares	0	0	4	0
Decrease in common stock for purchase of subsidiary shares	(24)	(17)	(37)	(36)
Net income attributable to common shareowners after transfers to noncontrolling interests	1,830	1,415	4,714	4,222
Shareowners' Equity [Member]
Equity, beginning of period	33,785	26,987	31,866	25,914
Net income	1,854	1,432	4,747	4,258
Total other comprehensive (loss) income	(766)	675	(289)	123
Total comprehensive income for the period	1,088	2,107	4,458	4,381
Common Stock issued under employee plans	154	312	444	764
Common Stock repurchased	(425)	(330)	(1,095)	(1,000)
Dividends on Common Stock	(512)	(465)	(1,538)	(1,395)
Dividends on ESOP Common Stock	(17)	(17)	(53)	(51)
(Purchase) / sale of subsidiary shares from noncontrolling interest	(24)	(17)	(33)	(36)
Redeemable noncontrolling interest	0	0	0	0
Equity, end of period	34,049	28,577	34,049	28,577
Noncontrolling Interest [Member]
Equity, beginning of period	1,408	1,382	1,353	1,155
Net income	98	111	301	286
Total other comprehensive (loss) income	(27)	17	(34)	(9)
Total comprehensive income for the period	71	128	267	277
Dividends attributable to noncontrolling interest	(145)	(161)	(245)	(288)
(Purchase) / sale of subsidiary shares from noncontrolling interest	6	(56)	0	175
Disposition noncontrolling interest	0	(1)	3	(6)
Redeemable noncontrolling interest	0	50	(38)	29
Equity, end of period	1,340	1,342	1,340	1,342
Redeemable Noncontrolling Interest [Member]
Net income	0	1	7	3
Foreign currency translation, net	(5)	1	(5)	(5)
Dividends attributable to noncontrolling interest	0	0	(3)	(3)
Disposition noncontrolling interest	0	0	0	(82)
Redeemable noncontrolling interest	$ 0	$ (52)	$ 31	$ (27)