Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income attributable to common shareowners:
Net income from continuing operations	$ 1,439	$ 1,426	$ 2,825	$ 2,598
Loss from discontinued operations	0	(47)	0	(36)
Net income attributable to common shareowners	$ 1,439	$ 1,379	$ 2,825	$ 2,562
Basic weighted average number of shares outstanding	788.7	825.3	791.1	825.1
Stock awards and equity units	9.5	8.3	9.3	7.4
Diluted weighted average number of shares outstanding	798.2	833.6	800.4	832.5
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations	$ 1.83	$ 1.73	$ 3.57	$ 3.15
Loss from discontinued operations	0.00	(0.06)	0.00	(0.04)
Net income attributable to common shareowners	1.83	1.67	3.57	3.11
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations	1.80	1.71	3.53	3.12
Loss from discontinued operations	0.00	(0.06)	0.00	(0.04)
Net income attributable to common shareowners	$ 1.80	$ 1.65	$ 3.53	$ 3.08
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	5.8	12.7	6.4	14.9