Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income attributable to common shareowners:
Net income from continuing operations	$ 1,238	$ 1,330	$ 4,583	$ 4,155
Net income attributable to common shareowners	$ 1,238	$ 1,330	$ 4,583	$ 4,155
Basic weighted average number of shares outstanding	791.3	788.3	790.6	790.3
Stock awards and equity units	10.5	8.8	10.1	9.1
Diluted weighted average number of shares outstanding	801.8	797.1	800.7	799.4
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations	$ 1.56	$ 1.69	$ 5.80	$ 5.26
Net income attributable to common shareowners	1.56	1.69	5.80	5.26
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations	1.54	1.67	5.72	5.20
Net income attributable to common shareowners	$ 1.54	$ 1.67	$ 5.72	$ 5.20
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	5.0	5.8	5.2	6.4