Computation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 6,033	$ 4,184	$ 3,028
Weighted average number of common shares	1,337,144	1,347,080	805,104
Effect of dilutive outstanding equity-based awards	12,234	11,209	10,100
Weighted average number of diluted common shares	1,349,378	1,358,289	815,204
Basic EPS	$ 4.51	$ 3.11	$ 3.76
Diluted EPS	$ 4.47	$ 3.08	$ 3.71
Anti-dilutive awards	3	16	4