Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	[1]
Current assets:
Cash and cash equivalents	$ 2,404	$ 1,482
Short-term investments	2,071	2,316
Receivables, less allowance for doubtful accounts (2018 - $7; 2017 - $7)	1,760	1,340
Aircraft fuel, spare parts and supplies, less obsolescence allowance (2018 - $365; 2017 - $354)	924	924
Prepaid expenses and other	1,128	1,071
Total current assets	8,287	7,133
Operating property and equipment: Owned-
Flight equipment	29,651	28,692
Other property and equipment	7,193	6,946
Total owned property and equipment	36,844	35,638
Less - Accumulated depreciation and amortization	(11,538)	(11,159)
Total owned property and equipment, net	25,306	24,479
Purchase deposits for flight equipment	1,025	1,344
Capital leases-
Flight equipment	1,205	1,151
Other property and equipment	11	11
Total capital leases	1,216	1,162
Less - Accumulated amortization	(808)	(777)
Total capital leases, net	408	385
Total operating property and equipment, net	26,739	26,208
Other assets:
Goodwill	4,523	4,523
Intangibles, less accumulated amortization (2018 - $1,329; 2017 - $1,313)	3,521	3,539
Restricted cash	95	91
Investments in affiliates and other, net	853	852
Total other assets	8,992	9,005
Total assets	44,018	42,346
Current liabilities:
Advance ticket sales	5,501	3,940
Accounts payable	2,399	2,196
Frequent flyer deferred revenue	2,221	2,192
Accrued salaries and benefits	1,637	2,166
Current maturities of long-term debt	1,655	1,565
Current maturities of capital leases	124	128
Other	646	576
Total current liabilities	14,183	12,763
Long-term debt	12,166	11,703
Long-term obligations under capital leases	1,019	996
Other liabilities and deferred credits:
Frequent flyer deferred revenue	2,716	2,591
Postretirement benefit liability	1,593	1,602
Pension liability	1,828	1,921
Deferred income taxes	250	204
Lease fair value adjustment, net	171	198
Other	1,756	1,634
Total other liabilities and deferred credits	8,314	8,150
Commitments and contingencies
Stockholders' equity:
Preferred stock
Common stock	3	3
Additional capital invested	6,077	6,098
Retained earnings	4,684	4,549
Stock held in treasury, at cost	(1,314)	(769)
Accumulated other comprehensive loss	(1,114)	(1,147)
Total stockholders' equity	8,336	8,734
Total liabilities and stockholders' equity	44,018	42,346
United Airlines, Inc.
Current assets:
Cash and cash equivalents	2,398	1,476
Short-term investments	2,071	2,316
Receivables, less allowance for doubtful accounts (2018 - $7; 2017 - $7)	1,760	1,340
Aircraft fuel, spare parts and supplies, less obsolescence allowance (2018 - $365; 2017 - $354)	924	924
Prepaid expenses and other	1,129	1,071
Total current assets	8,282	7,127
Operating property and equipment: Owned-
Flight equipment	29,651	28,692
Other property and equipment	7,193	6,946
Total owned property and equipment	36,844	35,638
Less - Accumulated depreciation and amortization	(11,538)	(11,159)
Total owned property and equipment, net	25,306	24,479
Purchase deposits for flight equipment	1,025	1,344
Capital leases-
Flight equipment	1,205	1,151
Other property and equipment	11	11
Total capital leases	1,216	1,162
Less - Accumulated amortization	(808)	(777)
Total capital leases, net	408	385
Total operating property and equipment, net	26,739	26,208
Other assets:
Goodwill	4,523	4,523
Intangibles, less accumulated amortization (2018 - $1,329; 2017 - $1,313)	3,521	3,539
Restricted cash	95	91
Investments in affiliates and other, net	853	852
Total other assets	8,992	9,005
Total assets	44,013	42,340
Current liabilities:
Advance ticket sales	5,501	3,940
Accounts payable	2,399	2,196
Frequent flyer deferred revenue	2,221	2,192
Accrued salaries and benefits	1,637	2,166
Current maturities of long-term debt	1,655	1,565
Current maturities of capital leases	124	128
Other	652	581
Total current liabilities	14,189	12,768
Long-term debt	12,166	11,703
Long-term obligations under capital leases	1,019	996
Other liabilities and deferred credits:
Frequent flyer deferred revenue	2,716	2,591
Postretirement benefit liability	1,593	1,602
Pension liability	1,828	1,921
Deferred income taxes	277	231
Lease fair value adjustment, net	171	198
Other	1,756	1,634
Total other liabilities and deferred credits	8,341	8,177
Commitments and contingencies
Stockholders' equity:
Additional capital invested	1,233	1,787
Retained earnings	8,287	8,146
Accumulated other comprehensive loss	(1,114)	(1,147)
Receivable from related parties	(108)	(90)
Total stockholders' equity	8,298	8,696
Total liabilities and stockholders' equity	$ 44,013	$ 42,340

[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.