Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net income attributable to common shareowners:
Net income from continuing operations	$ 1,420	$ 1,461	$ 2,600	$ 2,825
(Loss) income from discontinued operations	(47)	81	(36)	143
Net income attributable to common shareowners	$ 1,373	$ 1,542	$ 2,564	$ 2,968
Basic weighted average number of shares outstanding	825,300,000	877,300,000.0	825,100,000.0	884,800,000.0
Stock awards and equity units	7,400,000	12,100,000.0	6,800,000.0	13,000,000
Diluted weighted average number of shares outstanding	832,700,000.0	889,400,000.0	831,900,000.0	897,800,000.0
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations	$ 1.72	$ 1.67	$ 3.15	$ 3.19
(Loss) income from discontinued operations	(0.06)	0.09	(0.04)	0.16
Net income attributable to common shareowners	1.66	1.76	3.11	3.35
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations	1.71	1.64	3.13	3.15
(Loss) income from discontinued operations	(0.06)	0.09	(0.04)	0.16
Net income attributable to common shareowners	$ 1.65	$ 1.73	$ 3.08	$ 3.31
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	12,700,000	400,000	14,900,000	400,000