Statements of Consolidated Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net loss	$ (434)	$ (1,627)	$ (1,791)	$ (3,331)
Other comprehensive income (loss), net of tax:
Employee benefit plans	12	(501)	26	(542)
Investments and other	0	13	(1)	1
Total other comprehensive income (loss), net of tax	12	(488)	25	(541)
Total comprehensive loss, net	(422)	(2,115)	(1,766)	(3,872)
United Airlines, Inc.
Net loss	(434)	(1,626)	(1,791)	(3,330)
Other comprehensive income (loss), net of tax:
Employee benefit plans	12	(501)	26	(542)
Investments and other	0	13	(1)	1
Total other comprehensive income (loss), net of tax	12	(488)	25	(541)
Total comprehensive loss, net	$ (422)	$ (2,114)	$ (1,766)	$ (3,871)