Computation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 986	$ 749
Weighted average number of common shares	1,344,372	764,135
Effect of dilutive outstanding equity-based awards	13,173	9,936
Weighted average number of diluted common shares	1,357,545	774,071
Basic EPS	$ 0.73	$ 0.98
Diluted EPS	$ 0.73	$ 0.97
Anti-dilutive awards	1,725	0