Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income attributable to common shareowners:
Net income from continuing operations	$ 1,426	$ 1,755	$ 4,252	$ 4,788
Net (loss) income from discontinued operations	(64)	99	78	(41)
Net income attributable to common shareowners	$ 1,362	$ 1,854	$ 4,330	$ 4,747
Basic weighted average number of shares outstanding	876,400,000.0	897,700,000.0	882,100,000.0	899,300,000.0
Stock awards and equity units	8,600,000.0	12,500,000.0	11,500,000.0	13,800,000.0
Diluted weighted average number of shares outstanding	885,000,000	910,200,000.0	893,600,000.0	913,100,000.0
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations	$ 1.63	$ 1.96	$ 4.82	$ 5.32
Net (loss) income from discontinued operations	(0.07)	0.11	0.09	(0.05)
Net income attributable to common shareowners	1.55	2.07	4.91	5.28
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations	1.61	1.93	4.76	5.24
Net (loss) income from discontinued operations	(0.07)	0.11	0.09	(0.04)
Net income attributable to common shareowners	$ 1.54	$ 2.04	$ 4.85	$ 5.20
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	10,300,000	3,600,000	8,800,000	0