Statements of Consolidated Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating revenue:
Operating revenue	$ 7,750	$ 2,489	$ 16,442	$ 11,943
Operating expense:
Salaries and related costs	2,487	2,229	6,987	7,354
Aircraft fuel	1,710	508	3,793	2,474
Depreciation and amortization	623	626	1,866	1,859
Landing fees and other rent	652	500	1,735	1,552
Regional capacity purchase	520	425	1,546	1,550
Aircraft maintenance materials and outside repairs	346	115	917	659
Distribution expenses	218	53	442	379
Aircraft rent	58	50	165	147
Special charges (credits)	(1,098)	(1,081)	(3,423)	(2,467)
Other operating expenses	1,197	679	3,028	2,660
Total operating expense	6,713	4,104	17,056	16,167
Operating income (loss)	1,037	(1,615)	(614)	(4,224)
Nonoperating income (expense):
Interest expense	(449)	(345)	(1,228)	(712)
Interest capitalized	18	16	57	54
Interest income	11	8	30	45
Unrealized gains (losses) on investments, net	(34)	15	91	(295)
Miscellaneous, net	20	(411)	(48)	(1,317)
Total nonoperating expense, net	(434)	(717)	(1,098)	(2,225)
Income (loss) before income taxes	603	(2,332)	(1,712)	(6,449)
Income tax expense (benefit)	130	(491)	(394)	(1,277)
Net income (loss)	$ 473	$ (1,841)	$ (1,318)	$ (5,172)
Earnings (loss) per share, basic (in dollars per share)	$ 1.46	$ (6.33)	$ (4.10)	$ (18.91)
Earnings (loss) per share, diluted ( in dollars per share)	$ 1.44	$ (6.33)	$ (4.10)	$ (18.91)
United Airlines, Inc.
Operating revenue:
Operating revenue	$ 7,750	$ 2,489	$ 16,442	$ 11,943
Operating expense:
Salaries and related costs	2,487	2,229	6,987	7,354
Aircraft fuel	1,710	508	3,793	2,474
Depreciation and amortization	623	626	1,866	1,859
Landing fees and other rent	652	500	1,735	1,552
Regional capacity purchase	520	425	1,546	1,550
Aircraft maintenance materials and outside repairs	346	115	917	659
Distribution expenses	218	53	442	379
Aircraft rent	58	50	165	147
Special charges (credits)	(1,098)	(1,081)	(3,423)	(2,467)
Other operating expenses	1,197	679	3,027	2,659
Total operating expense	6,713	4,104	17,055	16,166
Operating income (loss)	1,037	(1,615)	(613)	(4,223)
Nonoperating income (expense):
Interest expense	(449)	(345)	(1,228)	(712)
Interest capitalized	18	16	57	54
Interest income	11	8	30	45
Unrealized gains (losses) on investments, net	(34)	15	91	(295)
Miscellaneous, net	21	(411)	(48)	(1,317)
Total nonoperating expense, net	(433)	(717)	(1,098)	(2,225)
Income (loss) before income taxes	604	(2,332)	(1,711)	(6,448)
Income tax expense (benefit)	130	(491)	(394)	(1,277)
Net income (loss)	474	(1,841)	(1,317)	(5,171)
Passenger revenue
Operating revenue:
Operating revenue	6,637	1,649	13,319	9,395
Passenger revenue | United Airlines, Inc.
Operating revenue:
Operating revenue	6,637	1,649	13,319	9,395
Cargo
Operating revenue:
Operating revenue	519	422	1,622	1,088
Cargo | United Airlines, Inc.
Operating revenue:
Operating revenue	519	422	1,622	1,088
Other operating revenue
Operating revenue:
Operating revenue	594	418	1,501	1,460
Other operating revenue | United Airlines, Inc.
Operating revenue:
Operating revenue	$ 594	$ 418	$ 1,501	$ 1,460