Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income attributable to common shareowners:
Net income from continuing operations	$ 1,443	$ 1,427	$ 4,041	$ 4,252
Income (loss) from discontinued operations	37	(65)	1	78
Net income attributable to common shareowners	$ 1,480	$ 1,362	$ 4,042	$ 4,330
Basic weighted average number of shares outstanding	822.4	876.4	824.0	882.1
Stock awards and equity units	8.8	8.6	7.8	11.5
Diluted weighted average number of shares outstanding	831.2	885.0	831.8	893.6
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations	$ 1.76	$ 1.63	$ 4.90	$ 4.82
Income (loss) from discontinued operations	0.04	(0.07)	0.00	0.09
Net income attributable to common shareowners	1.80	1.55	4.91	4.91
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations	1.74	1.61	4.86	4.76
Income (loss) from discontinued operations	0.04	(0.07)	0.00	0.09
Net income attributable to common shareowners	$ 1.78	$ 1.54	$ 4.86	$ 4.85
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	12.2	10.3	15.0	8.8