Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income attributable to common shareowners:
Net income attributable to common shareowners	$ (83)	$ 1,346
Basic weighted average number of shares outstanding	858.4	853.2
Stock awards and equity units	0.0	7.5
Diluted weighted average number of shares outstanding	858.4	860.7
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations	$ (0.10)	$ 1.58
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations	$ (0.10)	$ 1.56
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	16.7	12.2