Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2021

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial information

Quarterly results of operations for the years ended December 31, 2021 and 2020 are summarized below (in millions, except per share amounts):


	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2021
Operating revenues	$	733	$	1,499	$	1,972	$	1,834
Operating income (loss)(1)	(294)		147		186		(119)
Net income (loss)(1)(2)	(247)		64		130		(129)
Basic earnings (loss) per share	$	(0.78)	$	0.20	$	0.41	$	(0.40)
Diluted earnings per share(1)(2)	N/A		$	0.20	$	0.40	N/A

2020
Operating revenues	$	1,588	$	215	$	492	$	661
Operating (loss)(3)	(334)		(410)		(516)		(454)
Net (loss)(3)	(268)		(320)		(393)		(373)
(Loss) per share(3)	$	(0.97)	$	(1.18)	$	(1.44)	$	(1.31)

Our 2021 and 2020 results include the effects of various special items. Refer to "Part II - Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" within this Report for additional details.