Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,694	$ 1,482	[1]
Short-term investments	2,256	2,316	[1]
Receivables, less allowance for doubtful accounts (2018—$8; 2017—$7)	1,346	1,340	[1]
Aircraft fuel, spare parts and supplies, less obsolescence allowance (2018—$412; 2017—$354)	985	924	[1]
Prepaid expenses and other	913	1,071	[1]
Total current assets	7,194	7,133	[1]
Owned—
Flight equipment	31,607	28,692	[1]
Other property and equipment	7,919	6,946	[1]
Total owned property and equipment	39,526	35,638	[1]
Less—Accumulated depreciation and amortization	(12,760)	(11,159)	[1]
Total owned property and equipment, net	26,766	24,479	[1]
Purchase deposits for flight equipment	1,177	1,344	[1]
Capital leases—
Flight equipment	1,029	1,151	[1]
Other property and equipment	11	11	[1]
Total capital leases	1,040	1,162	[1]
Less—Accumulated amortization	(654)	(777)	[1]
Total capital leases, net	386	385	[1]
Total operating property and equipment, net	28,329	26,208	[1]
Other assets:
Goodwill	4,523	4,523	[1]
Intangibles, less accumulated amortization (2018—$1,380; 2017—$1,313)	3,159	3,539	[1]
Restricted cash	105	91	[1]
Notes receivable, net	516	46	[1]
Investments in affiliates and other, net	966	806	[1]
Total other assets	9,269	9,005	[1]
Total assets	44,792	42,346	[1]
Current liabilities:
Advance ticket sales	4,381	3,940	[1]
Frequent flyer deferred revenue	2,286	2,192	[1]
Accounts payable	2,363	2,196	[1]
Accrued salaries and benefits	2,184	2,166	[1]
Current maturities of long-term debt	1,230	1,565	[1]
Current maturities of capital leases	149	128	[1]
Other	619	576	[1]
Total current liabilities	13,212	12,763	[1]
Long-term debt	12,215	11,703	[1]
Long-term obligations under capital leases	1,134	996	[1]
Other liabilities and deferred credits:
Frequent flyer deferred revenue	2,719	2,591	[1]
Postretirement benefit liability	1,295	1,602	[1]
Pension liability	1,576	1,921	[1]
Deferred income taxes	814	204	[1]
Other	1,832	1,832	[1]
Total other liabilities and deferred credits	8,236	8,150	[1]
Commitments and contingencies
Stockholders' equity:
Preferred stock	0	0	[1]
Common stock	3	3	[1]
Additional capital invested	6,120	6,098	[1]
Retained earnings	6,668	4,549	[1]
Stock held in treasury, at cost	(1,993)	(769)	[1]
Accumulated other comprehensive loss	(803)	(1,147)	[1]
Total stockholders' equity	9,995	8,734	[1]
Total liabilities and stockholders' equity	44,792	42,346	[1]
United Airlines, Inc.
Current assets:
Cash and cash equivalents	1,688	1,476	[2]
Short-term investments	2,256	2,316	[2]
Receivables, less allowance for doubtful accounts (2018—$8; 2017—$7)	1,346	1,340	[2]
Aircraft fuel, spare parts and supplies, less obsolescence allowance (2018—$412; 2017—$354)	985	924	[2]
Prepaid expenses and other	913	1,071	[2]
Total current assets	7,188	7,127	[2]
Owned—
Flight equipment	31,607	28,692	[2]
Other property and equipment	7,919	6,946	[2]
Total owned property and equipment	39,526	35,638	[2]
Less—Accumulated depreciation and amortization	(12,760)	(11,159)	[2]
Total owned property and equipment, net	26,766	24,479	[2]
Purchase deposits for flight equipment	1,177	1,344	[2]
Capital leases—
Flight equipment	1,029	1,151	[2]
Other property and equipment	11	11	[2]
Total capital leases	1,040	1,162	[2]
Less—Accumulated amortization	(654)	(777)	[2]
Total capital leases, net	386	385	[2]
Total operating property and equipment, net	28,329	26,208	[2]
Other assets:
Goodwill	4,523	4,523	[2]
Intangibles, less accumulated amortization (2018—$1,380; 2017—$1,313)	3,159	3,539	[2]
Restricted cash	105	91	[2]
Notes receivable, net	516	46	[2]
Investments in affiliates and other, net	966	806	[2]
Total other assets	9,269	9,005	[2]
Total assets	44,786	42,340	[2]
Current liabilities:
Advance ticket sales	4,381	3,940	[2]
Frequent flyer deferred revenue	2,286	2,192	[2]
Accounts payable	2,363	2,196	[2]
Accrued salaries and benefits	2,184	2,166	[2]
Current maturities of long-term debt	1,230	1,565	[2]
Current maturities of capital leases	149	128	[2]
Other	624	581	[2]
Total current liabilities	13,217	12,768	[2]
Long-term debt	12,215	11,703	[2]
Long-term obligations under capital leases	1,134	996	[2]
Other liabilities and deferred credits:
Frequent flyer deferred revenue	2,719	2,591	[2]
Postretirement benefit liability	1,295	1,602	[2]
Pension liability	1,576	1,921	[2]
Deferred income taxes	842	231	[2]
Other	1,831	1,832	[2]
Total other liabilities and deferred credits	8,263	8,177	[2]
Commitments and contingencies
Stockholders' equity:
Common stock	0	0	[2]
Additional capital invested	598	1,787	[2]
Retained earnings	10,272	8,146	[2]
Accumulated other comprehensive loss	(803)	(1,147)	[2]
Receivable from related parties	(110)	(90)	[2]
Total stockholders' equity	9,957	8,696	[2]
Total liabilities and stockholders' equity	$ 44,786	$ 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 II, Item 8 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 II, Item 8 of this report for additional information.