Earnings per share (Tables)

9 Months Ended

Sep. 30, 2017

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):

	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Income (Numerator):
Net income for basic and diluted EPS	$	2,021	$	2,017	$	6,243	$	5,787
Shares (Denominator):
Weighted-average shares for basic EPS	728		747		733		752
Effect of dilutive securities	5		6		5		6
Weighted-average shares for diluted EPS	733		753		738		758
Basic EPS	$	2.78	$	2.70	$	8.52	$	7.70
Diluted EPS	$	2.76	$	2.68	$	8.46	$	7.63