Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 20,838	$ 11,269
Short-term investments	230	414
Restricted cash	254	255
Receivables, less allowance for credit losses (2021 — $71; 2020 — $78)	1,793	1,295
Aircraft fuel, spare parts and supplies, less obsolescence allowance (2021 — $518; 2020 — $478)	912	932
Prepaid expenses and other	646	635
Total current assets	24,673	14,800
Operating property and equipment:
Flight equipment	39,109	38,218
Other property and equipment	8,683	8,511
Purchase deposits for flight equipment	1,980	1,166
Total operating property and equipment	49,772	47,895
Less — Accumulated depreciation and amortization	(17,441)	(16,429)
Total operating property and equipment, net	32,331	31,466
Operating lease right-of-use assets	4,421	4,537
Other assets:
Goodwill	4,527	4,527
Intangibles, less accumulated amortization (2021 — $1,519; 2020 — $1,495)	2,827	2,838
Restricted cash	216	218
Deferred income taxes	647	131
Investments in affiliates and other, less allowance for credit losses (2021 — $606; 2020 — $522)	1,407	1,031
Total other assets	9,624	8,745
Total assets	71,049	59,548
Current liabilities:
Accounts payable	2,218	1,595
Accrued salaries and benefits	2,228	1,960
Advance ticket sales	6,960	4,833
Frequent flyer deferred revenue	2,099	908
Current maturities of long-term debt	1,881	1,911
Current maturities of operating leases	583	612
Current maturities of finance leases	144	182
Payroll Support Program deferred credit	1,132	0
Other	819	724
Total current liabilities	18,064	12,725
Long-term debt	32,303	24,836
Long-term obligations under operating leases	4,920	4,986
Long-term obligations under finance leases	250	224
Other liabilities and deferred credits:
Frequent flyer deferred revenue	4,086	5,067
Pension liability	2,501	2,460
Postretirement benefit liability	988	994
Other financial liabilities from sale-leasebacks	1,683	1,140
Other	1,350	1,156
Total other liabilities and deferred credits	10,608	10,817
Commitments and contingencies
Stockholders' equity:
Preferred stock	0	0
Common stock	4	4
Additional capital invested	9,042	8,366
Stock held in treasury, at cost	(3,832)	(3,897)
Retained earnings	804	2,626
Accumulated other comprehensive loss	(1,114)	(1,139)
Total stockholders' equity	4,904	5,960
Total liabilities and stockholders' equity	71,049	59,548
United Airlines, Inc.
Current assets:
Cash and cash equivalents	20,838	11,269
Short-term investments	230	414
Restricted cash	254	255
Receivables, less allowance for credit losses (2021 — $71; 2020 — $78)	1,793	1,295
Aircraft fuel, spare parts and supplies, less obsolescence allowance (2021 — $518; 2020 — $478)	912	932
Prepaid expenses and other	646	635
Total current assets	24,673	14,800
Operating property and equipment:
Flight equipment	39,109	38,218
Other property and equipment	8,683	8,511
Purchase deposits for flight equipment	1,980	1,166
Total operating property and equipment	49,772	47,895
Less — Accumulated depreciation and amortization	(17,441)	(16,429)
Total operating property and equipment, net	32,331	31,466
Operating lease right-of-use assets	4,421	4,537
Other assets:
Goodwill	4,527	4,527
Intangibles, less accumulated amortization (2021 — $1,519; 2020 — $1,495)	2,827	2,838
Restricted cash	216	218
Deferred income taxes	619	103
Investments in affiliates and other, less allowance for credit losses (2021 — $606; 2020 — $522)	1,407	1,031
Total other assets	9,596	8,717
Total assets	71,021	59,520
Current liabilities:
Accounts payable	2,218	1,595
Accrued salaries and benefits	2,228	1,960
Advance ticket sales	6,960	4,833
Frequent flyer deferred revenue	2,099	908
Current maturities of long-term debt	1,881	1,911
Current maturities of operating leases	583	612
Current maturities of finance leases	144	182
Payroll Support Program deferred credit	1,132	0
Other	823	728
Total current liabilities	18,068	12,729
Long-term debt	32,303	24,836
Long-term obligations under operating leases	4,920	4,986
Long-term obligations under finance leases	250	224
Other liabilities and deferred credits:
Frequent flyer deferred revenue	4,086	5,067
Pension liability	2,501	2,460
Postretirement benefit liability	988	994
Other financial liabilities from sale-leasebacks	1,683	1,140
Other	1,350	1,156
Total other liabilities and deferred credits	10,608	10,817
Commitments and contingencies
Stockholders' equity:
Common stock	0	0
Additional capital invested	185	85
Retained earnings	3,148	4,939
Accumulated other comprehensive loss	(1,114)	(1,139)
Payable to parent	2,653	2,043
Total stockholders' equity	4,872	5,928
Total liabilities and stockholders' equity	$ 71,021	$ 59,520