Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings per Common Share

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

	Year Ended December 31,
	2017		2016		2015
Basic EPS:
Net income	$	1,919	$	2,676	$	7,610
Weighted average common shares outstanding (in thousands)	489,164		552,308		668,393
Basic EPS	$	3.92	$	4.85	$	11.39
Diluted EPS:
Net income for purposes of computing diluted EPS	$	1,919	$	2,676	$	7,610
Share computation for diluted EPS (in thousands):
Basic weighted average common shares outstanding	489,164		552,308		668,393
Dilutive effect of stock awards	2,528		3,791		18,962
Diluted weighted average common shares outstanding	491,692		556,099		687,355
Diluted EPS	$	3.90	$	4.81	$	11.07
Restricted stock unit awards excluded from the calculation of diluted EPS because inclusion would be antidilutive (in thousands)	328		1,429		764