Earnings/(Loss) Per Share of Common Stock - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021		Sep. 30, 2022	Sep. 30, 2021
Number of shares on which basic earnings per share is calculated:
Weighted-average shares outstanding during period (in shares)	904,076,831	897,097,073	[1]	901,621,217	895,257,004	[1]
Add - Incremental shares under stock-based compensation plans (in shares)		6,946,467			7,000,190
Add - Incremental shares associated with contingently issuable shares (in shares)		1,909,573			1,720,345
Number of shares on which diluted earnings per share is calculated (in shares)	904,076,831	905,953,114	[1]	901,621,217	903,977,539	[1]
Net income on which basic earnings per share is calculated
Income/(loss) from continuing operations	$ (3,214)	$ 1,037		$ (1,087)	$ 2,250
Income/(loss) from discontinued operations, net of tax	18	93		16	1,160
Net income/(loss) on which basic earnings per share is calculated	(3,196)	1,130		(1,071)	3,410
Net income/(loss) on which diluted earnings per share is calculated
Income/(loss) from continuing operations	(3,214)	1,037		(1,087)	2,250
Income/(loss) from continuing operations on which diluted earnings per share is calculated	(3,214)	1,037		(1,087)	2,250
Income/(loss) from discontinued operations, net of tax, on which diluted earnings per share is calculated	18	93		16	1,160
Net income/(loss) on which diluted earnings per share is calculated	$ (3,196)	$ 1,130		$ (1,071)	$ 3,410
Assuming dilution
Continuing operations (in dollars per share)	$ (3.55)	$ 1.14	[1]	$ (1.21)	$ 2.49	[1]
Discontinued operations (in dollars per share)	0.02	0.10	[1]	0.02	1.28	[1]
Total (in dollars per share)	(3.54)	1.25	[1]	(1.19)	3.77	[1]
Basic
Continuing operations (in dollars per share)	(3.55)	1.16	[1]	(1.21)	2.51	[1]
Discontinued operations (in dollars per share)	0.02	0.10	[1]	0.02	1.30	[1]
Total (in dollars per share)	$ (3.54)	$ 1.26	[1]	$ (1.19)	$ 3.81	[1]

[1] Reclassified to reflect discontinued operations presentation.