Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 1,478	$ 2,762
Short-term investments	960	487
Accounts receivable, net of an allowance for uncollectible accounts of $12 and $15 at September 30, 2017 and December 31, 2016, respectively	2,399	2,064
Fuel inventory	720	519
Expendable parts and supplies inventories, net of an allowance for obsolescence of $124 and $110 at September 30, 2017 and December 31, 2016, respectively	416	372
Prepaid expenses and other	1,110	1,247
Total current assets	7,083	7,451
Property and Equipment, Net:
Property and equipment, net of accumulated depreciation and amortization of $13,766 and $12,456 at September 30, 2017 and December 31, 2016, respectively	25,900	24,375
Other Assets:
Goodwill	9,794	9,794
Identifiable intangibles, net of accumulated amortization of $841 and $828 at September 30, 2017 and December 31, 2016, respectively	4,851	4,844
Deferred income taxes, net	1,422	3,064
Other noncurrent assets	2,878	1,733
Total other assets	18,945	19,435
Total assets	51,928	51,261
Current Liabilities:
Current maturities of long-term debt and capital leases	1,224	1,131
Air traffic liability	5,528	4,626
Accounts payable	3,059	2,572
Accrued salaries and related benefits	2,683	2,924
Frequent flyer deferred revenue	1,759	1,648
Other accrued liabilities	2,243	2,338
Total current liabilities	16,496	15,239
Noncurrent Liabilities:
Long-term debt and capital leases	7,584	6,201
Pension, postretirement and related benefits	9,565	13,378
Frequent flyer deferred revenue	2,281	2,278
Other noncurrent liabilities	2,001	1,878
Total noncurrent liabilities	21,431	23,735
Commitments and Contingencies
Stockholders' Equity:
Common stock at $0.0001 par value; 1,500,000,000 shares authorized, 720,433,073 and 744,886,938 shares issued at September 30, 2017 and December 31, 2016, respectively	0	0
Additional paid-in capital	12,133	12,294
Retained earnings	9,502	7,903
Accumulated other comprehensive loss	(7,476)	(7,636)
Treasury stock, at cost, 7,459,934 and 14,149,229 shares at September 30, 2017 and December 31, 2016, respectively	(158)	(274)
Total stockholders' equity	14,001	12,287
Total liabilities and stockholders' equity	$ 51,928	$ 51,261