Selected Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Selected Quarterly Data (Unaudited) [Abstract]

Selected Quarterly Data (Unaudited)

Millions, Except Per Share Amounts
2019	Mar. 31		Jun. 30		Sep. 30		Dec. 31
Operating revenues	$	5,384	$	5,596	$	5,516	$	5,212
Operating income		1,960		2,260		2,234		2,100
Net income		1,391		1,570		1,555		1,403
Net income per share:
Basic		1.94		2.23		2.22		2.03
Diluted		1.93		2.22		2.22		2.02

Millions, Except Per Share Amounts
2018	Mar. 31		Jun. 30		Sep. 30		Dec. 31
Operating revenues	$	5,475	$	5,672	$	5,928	$	5,757
Operating income		1,939		2,099		2,269		2,210
Net income		1,310		1,509		1,593		1,554
Net income per share:
Basic		1.69		1.98		2.16		2.13
Diluted		1.68		1.98		2.15		2.12