Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income attributable to common shareowners:
Net income from continuing operations	$ 2,048	$ 1,439	$ 3,345	$ 2,825
Net income attributable to common shareowners	$ 2,048	$ 1,439	$ 3,345	$ 2,825
Basic weighted average number of shares outstanding	790.5	788.7	790.2	791.1
Stock awards and equity units	9.1	9.5	9.8	9.3
Diluted weighted average number of shares outstanding	799.6	798.2	800.0	800.4
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations	$ 2.59	$ 1.83	$ 4.23	$ 3.57
Net income attributable to common shareowners	2.59	1.83	4.23	3.57
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations	2.56	1.80	4.18	3.53
Net income attributable to common shareowners	$ 2.56	$ 1.80	$ 4.18	$ 3.53
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	5.1	5.8	5.1	6.4