Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 1,380	$ 1,814
Short-term investments	478	825
Accounts receivable, net of an allowance for uncollectible accounts of $12 at September 30, 2018 and December 31, 2017	2,517	2,377
Fuel inventory	715	916
Expendable parts and supplies inventories, net of an allowance for obsolescence of $125 and $113 at September 30, 2018 and December 31, 2017, respectively	455	413
Prepaid expenses and other	1,181	1,499
Total current assets	6,726	7,844
Property and Equipment, Net:
Property and equipment, net of accumulated depreciation and amortization of $15,552 and $14,097 at September 30, 2018 and December 31, 2017, respectively	28,565	26,563
Other Assets:
Goodwill	9,794	9,794
Identifiable intangibles, net of accumulated amortization of $857 and $845 at September 30, 2018 and December 31, 2017, respectively	4,835	4,847
Cash restricted for airport construction	1,214	0
Deferred income taxes, net	432	1,354
Other noncurrent assets	3,437	3,309
Total other assets	19,712	19,304
Total assets	55,003	53,711
Current Liabilities:
Current maturities of long-term debt and capital leases	1,176	2,242
Accounts payable	3,265	3,674
Accrued salaries and related benefits	2,852	3,022
Fuel card obligation	1,066	1,067
Other accrued liabilities	1,329	1,868
Total current liabilities	18,158	18,999
Noncurrent Liabilities:
Long-term debt and capital leases	8,115	6,592
Pension, postretirement and related benefits	8,902	9,810
Other noncurrent liabilities	2,517	2,221
Total noncurrent liabilities	23,141	22,182
Commitments and Contingencies
Stockholders' Equity:
Common stock at $0.0001 par value; 1,500,000,000 shares authorized, 693,799,424 and 714,674,160 shares issued at September 30, 2018 and December 31, 2017, respectively	0	0
Additional paid-in capital	11,740	12,053
Retained earnings	9,696	8,256
Accumulated other comprehensive loss	(7,535)	(7,621)
Treasury stock, at cost, 8,180,723 and 7,476,181 shares at September 30, 2018 and December 31, 2017, respectively	(197)	(158)
Total stockholders' equity	13,704	12,530
Total liabilities and stockholders' equity	55,003	53,711
Air Traffic
Current Liabilities:
Deferred revenue, current	5,535	4,364
Frequent Flyer
Current Liabilities:
Deferred revenue, current	2,935	2,762
Noncurrent Liabilities:
Deferred revenue, noncurrent	$ 3,607	$ 3,559