Computation of Basic/Diluted Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Schedule of computation of earnings per share

The following table sets forth the computation of basic and diluted earnings per common share (amounts in millions, except per share data): 

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2019		2018		2019		2018
Numerator:
Consolidated net income	$	204	$	260	$	978	$	1,162
Denominator:
Denominator for basic earnings per common share—weighted-average common shares outstanding	767		763		766		761
Effect of potential dilutive common shares under the treasury stock method—employee stock options and awards	4		8		4		10
Denominator for basic earnings per common share—weighted-average dilutive common shares outstanding	771		771		770		771
Basic earnings per common share	$	0.27	$	0.34	$	1.28	$	1.53
Diluted earnings per common share	$	0.26	$	0.34	$	1.27	$	1.51

Schedule of antidilutive securities excluded from computation of earnings per share

Weighted-average shares excluded from the computation of diluted earnings per share were as follows (amounts in millions):

	For the Three Months Ended September 30,		For the Nine Months Ended September 30,
	2019	2018	2019	2018
Restricted stock units and options with performance measures not yet met	4	6	3	6
Anti-dilutive employee stock options	6	1	6	2