Statements of Consolidated Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating revenue:
Total operating revenue	$ 14,178	$ 12,112	$ 25,607	$ 19,678
Operating expense:
Salaries and related costs	3,710	2,836	7,032	5,623
Aircraft fuel	2,820	3,811	5,994	6,041
Landing fees and other rent	765	668	1,482	1,280
Aircraft maintenance materials and outside repairs	686	527	1,388	934
Depreciation and amortization	669	611	1,324	1,222
Regional capacity purchase	599	567	1,214	1,132
Distribution expenses	487	393	890	619
Aircraft rent	49	67	105	128
Special charges	859	112	873	104
Other operating expenses	2,017	1,642	3,831	3,093
Total operating expense	12,661	11,234	24,133	20,176
Operating income (loss)	1,517	878	1,474	(498)
Nonoperating income (expense):
Interest expense	(493)	(420)	(979)	(844)
Interest capitalized	42	22	80	46
Interest income	216	33	386	38
Unrealized gains (losses) on investments, net	84	(40)	108	(40)
Miscellaneous, net	21	(14)	62	5
Total nonoperating expense, net	(130)	(419)	(343)	(795)
Income (loss) before income tax expense (benefit)	1,387	459	1,131	(1,293)
Income tax expense (benefit)	312	130	250	(245)
Net income (loss)	1,075	329	881	(1,048)
United Airlines, Inc.
Operating revenue:
Total operating revenue	14,178	12,112	25,607	19,678
Operating expense:
Salaries and related costs	3,710	2,836	7,032	5,623
Aircraft fuel	2,820	3,811	5,994	6,041
Landing fees and other rent	765	668	1,482	1,280
Aircraft maintenance materials and outside repairs	686	527	1,388	934
Depreciation and amortization	669	611	1,324	1,222
Regional capacity purchase	599	567	1,214	1,132
Distribution expenses	487	393	890	619
Aircraft rent	49	67	105	128
Special charges	859	112	873	104
Other operating expenses	2,016	1,642	3,830	3,092
Total operating expense	12,660	11,234	24,132	20,175
Operating income (loss)	1,518	878	1,475	(497)
Nonoperating income (expense):
Interest expense	(493)	(420)	(979)	(844)
Interest capitalized	42	22	80	46
Interest income	216	33	386	38
Unrealized gains (losses) on investments, net	84	(40)	108	(40)
Miscellaneous, net	21	(14)	62	5
Total nonoperating expense, net	(130)	(419)	(343)	(795)
Income (loss) before income tax expense (benefit)	1,388	459	1,132	(1,292)
Income tax expense (benefit)	313	129	251	(245)
Net income (loss)	1,075	330	881	(1,047)
Passenger revenue
Operating revenue:
Total operating revenue	13,002	10,829	23,276	17,177
Passenger revenue | United Airlines, Inc.
Operating revenue:
Total operating revenue	13,002	10,829	23,276	17,177
Cargo
Operating revenue:
Total operating revenue	362	574	760	1,201
Cargo | United Airlines, Inc.
Operating revenue:
Total operating revenue	362	574	760	1,201
Other operating revenue
Operating revenue:
Total operating revenue	814	709	1,571	1,300
Other operating revenue | United Airlines, Inc.
Operating revenue:
Total operating revenue	$ 814	$ 709	$ 1,571	$ 1,300