Computation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 1,327	$ 1,334
Weighted average number of common shares	1,329,037	1,345,666
Effect of dilutive outstanding equity-based awards	12,526	13,266
Weighted average number of diluted common shares	1,341,563	1,358,932
Basic EPS	$ 1.00	$ 0.99
Diluted EPS	$ 0.99	$ 0.98
Anti-dilutive awards	0	376