Earnings per share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Computation for basic and diluted earnings per share

The computations for basic and diluted EPS were as follows (in millions, except per-share data):

	Years ended December 31,
	2019		2018		2017
Income (Numerator):
Net income for basic and diluted EPS	$	7,842	$	8,394	$	1,979
Shares (Denominator):
Weighted-average shares for basic EPS	605		661		731
Effect of dilutive securities	4		4		4
Weighted-average shares for diluted EPS	609		665		735
Basic EPS	$	12.96	$	12.70	$	2.71
Diluted EPS	$	12.88	$	12.62	$	2.69