Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income attributable to common shareowners:
Net income attributable to common shareowners	$ 1,346	$ 1,297
Basic weighted average number of shares outstanding	853.2	789.9
Stock awards and equity units	7.5	10.5
Diluted weighted average number of shares outstanding	860.7	800.4
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations	$ 1.58	$ 1.64
Net income attributable to common shareowners	1.58	1.64
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations	1.56	1.62
Net income attributable to common shareowners	$ 1.56	$ 1.62
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	12.2	4.3