Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 2,884	$ 1,482	[1]
Short-term investments	2,187	2,316	[1]
Receivables, less allowance for doubtful accounts (2018 — $7; 2017 — $7)	1,840	1,340	[1]
Aircraft fuel, spare parts and supplies, less obsolescence allowance (2018 — $380; 2017 — $354)	942	924	[1]
Prepaid expenses and other	1,028	1,071	[1]
Total current assets	8,881	7,133	[1]
Owned—
Flight equipment	30,143	28,692	[1]
Other property and equipment	7,481	6,946	[1]
Total owned property and equipment	37,624	35,638	[1]
Less — Accumulated depreciation and amortization	(11,974)	(11,159)	[1]
Total owned property and equipment, net	25,650	24,479	[1]
Purchase deposits for flight equipment	894	1,344	[1]
Capital leases—
Flight equipment	1,224	1,151	[1]
Other property and equipment	11	11	[1]
Total capital leases	1,235	1,162	[1]
Less — Accumulated amortization	(833)	(777)	[1]
Total capital leases, net	402	385	[1]
Total operating property and equipment, net	26,946	26,208	[1]
Other assets:
Goodwill	4,523	4,523	[1]
Intangibles, less accumulated amortization (2018 — $1,346; 2017 — $1,313)	3,399	3,539	[1]
Restricted cash	94	91	[1]
Investments in affiliates and other, net	848	852	[1]
Total other assets	8,864	9,005	[1]
Total assets	44,691	42,346	[1]
Current liabilities:
Advance ticket sales	5,826	3,940	[1]
Accounts payable	2,703	2,196	[1]
Frequent flyer deferred revenue	2,206	2,192	[1]
Accrued salaries and benefits	1,782	2,166	[1]
Current maturities of long-term debt	887	1,565	[1]
Current maturities of capital leases	117	128	[1]
Other	571	576	[1]
Total current liabilities	14,092	12,763	[1]
Long-term debt	12,460	11,703	[1]
Long-term obligations under capital leases	1,039	996	[1]
Other liabilities and deferred credits:
Frequent flyer deferred revenue	2,783	2,591	[1]
Postretirement benefit liability	1,585	1,602	[1]
Pension liability	1,815	1,921	[1]
Deferred income taxes	419	204	[1]
Lease fair value adjustment, net	155	198	[1]
Other	1,704	1,634	[1]
Total other liabilities and deferred credits	8,461	8,150	[1]
Commitments and contingencies
Stockholders' equity:
Preferred stock	0	0	[1]
Common stock	3	3	[1]
Additional capital invested	6,091	6,098	[1]
Retained earnings	5,367	4,549	[1]
Stock held in treasury, at cost	(1,720)	(769)	[1]
Accumulated other comprehensive loss	(1,102)	(1,147)	[1]
Total stockholders' equity	8,639	8,734	[1]
Total liabilities and stockholders' equity	44,691	42,346	[1]
United Airlines, Inc.
Current assets:
Cash and cash equivalents	2,878	1,476	[2]
Short-term investments	2,187	2,316	[2]
Receivables, less allowance for doubtful accounts (2018 — $7; 2017 — $7)	1,840	1,340	[2]
Aircraft fuel, spare parts and supplies, less obsolescence allowance (2018 — $380; 2017 — $354)	942	924	[2]
Prepaid expenses and other	1,028	1,071	[2]
Total current assets	8,875	7,127	[2]
Owned—
Flight equipment	30,143	28,692	[2]
Other property and equipment	7,481	6,946	[2]
Total owned property and equipment	37,624	35,638	[2]
Less — Accumulated depreciation and amortization	(11,974)	(11,159)	[2]
Total owned property and equipment, net	25,650	24,479	[2]
Purchase deposits for flight equipment	894	1,344	[2]
Capital leases—
Flight equipment	1,224	1,151	[2]
Other property and equipment	11	11	[2]
Total capital leases	1,235	1,162	[2]
Less — Accumulated amortization	(833)	(777)	[2]
Total capital leases, net	402	385	[2]
Total operating property and equipment, net	26,946	26,208	[2]
Other assets:
Goodwill	4,523	4,523	[2]
Intangibles, less accumulated amortization (2018 — $1,346; 2017 — $1,313)	3,399	3,539	[2]
Restricted cash	94	91	[2]
Investments in affiliates and other, net	848	852	[2]
Total other assets	8,864	9,005	[2]
Total assets	44,685	42,340	[2]
Current liabilities:
Advance ticket sales	5,826	3,940	[2]
Accounts payable	2,703	2,196	[2]
Frequent flyer deferred revenue	2,206	2,192	[2]
Accrued salaries and benefits	1,782	2,166	[2]
Current maturities of long-term debt	887	1,565	[2]
Current maturities of capital leases	117	128	[2]
Other	575	581	[2]
Total current liabilities	14,096	12,768	[2]
Long-term debt	12,460	11,703	[2]
Long-term obligations under capital leases	1,039	996	[2]
Other liabilities and deferred credits:
Frequent flyer deferred revenue	2,783	2,591	[2]
Postretirement benefit liability	1,585	1,602	[2]
Pension liability	1,815	1,921	[2]
Deferred income taxes	446	231	[2]
Lease fair value adjustment, net	155	198	[2]
Other	1,704	1,634	[2]
Total other liabilities and deferred credits	8,488	8,177	[2]
Commitments and contingencies
Stockholders' equity:
Common stock	0	0	[2]
Additional capital invested	841	1,787	[2]
Retained earnings	8,971	8,146	[2]
Accumulated other comprehensive loss	(1,102)	(1,147)	[2]
Receivable from related parties	(108)	(90)	[2]
Total stockholders' equity	8,602	8,696	[2]
Total liabilities and stockholders' equity	$ 44,685	$ 42,340	[2]

[1] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements contained in Part I, Item 1 of this report for additional information.

[2] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements contained in Part I, Item 1 of this report for additional information.