Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income (loss) attributable to common shareowners:
Income (loss) from continuing operations attributable to common shareowners	$ 1,400	$ 151	$ 3,212	$ (3,255)
Income (loss) from discontinued operations attributable to common shareowners	(7)	113	(34)	(399)
Net income (loss) attributable to common shareowners	$ 1,393	$ 264	$ 3,178	$ (3,654)
Basic weighted average number of shares outstanding	1,497.9	1,511.5	1,505.0	1,311.3
Stock awards and equity units (share equivalent)	8.0	2.7	6.0	0.0
Diluted weighted average number of shares outstanding	1,505.9	1,514.2	1,511.0	1,311.3
Earnings (loss) Per Share attributable to common shareowners - Basic:
Income (loss) from continuing operations	$ 0.93	$ 0.10	$ 2.13	$ (2.48)
Income (loss) from discontinued operations	0	0.08	(0.02)	(0.30)
Earnings Per Share, Basic	0.93	0.17	2.11	(2.79)
Earnings (loss) Per Share attributable to common shareowners - Diluted:
Income (loss) from continuing operations	0.93	0.10	2.13	(2.48)
Income (loss) from discontinued operations	0	0.08	(0.03)	(0.30)
Earnings Per Share, Diluted	$ 0.93	$ 0.17	$ 2.10	$ (2.79)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	8.0	38.1	15.3	31.5