Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 2,241	$ 2,762
Short-term investments	747	487
Accounts receivable, net of an allowance for uncollectible accounts of $11 and $15 at June 30, 2017 and December 31, 2016, respectively	2,164	2,064
Fuel inventory	537	519
Expendable parts and supplies inventories, net of an allowance for obsolescence of $119 and $110 at June 30, 2017 and December 31, 2016, respectively	401	372
Prepaid expenses and other	1,087	1,247
Total current assets	7,177	7,451
Property and Equipment, Net:
Property and equipment, net of accumulated depreciation and amortization of $13,336 and $12,456 at June 30, 2017 and December 31, 2016, respectively	25,367	24,375
Other Assets:
Goodwill	9,794	9,794
Identifiable intangibles, net of accumulated amortization of $837 and $828 at June 30, 2017 and December 31, 2016, respectively	4,855	4,844
Deferred income taxes, net	2,077	3,064
Other noncurrent assets	2,545	1,733
Total other assets	19,271	19,435
Total assets	51,815	51,261
Current Liabilities:
Current maturities of long-term debt and capital leases	1,098	1,131
Air traffic liability	6,365	4,626
Accounts payable	2,726	2,572
Accrued salaries and related benefits	2,259	2,924
Frequent flyer deferred revenue	1,726	1,648
Other accrued liabilities	2,457	2,338
Total current liabilities	16,631	15,239
Noncurrent Liabilities:
Long-term debt and capital leases	7,916	6,201
Pension, postretirement and related benefits	9,623	13,378
Frequent flyer deferred revenue	2,281	2,278
Other noncurrent liabilities	1,885	1,878
Total noncurrent liabilities	21,705	23,735
Commitments and Contingencies
Stockholders' Equity:
Common stock at $0.0001 par value; 1,500,000,000 shares authorized, 731,451,949 and 744,886,938 shares issued at June 30, 2017 and December 31, 2016, respectively	0	0
Additional paid-in capital	12,279	12,294
Retained earnings	8,905	7,903
Accumulated other comprehensive loss	(7,549)	(7,636)
Treasury stock, at cost, 7,421,731 and 14,149,229 shares at June 30, 2017 and December 31, 2016, respectively	(156)	(274)
Total stockholders' equity	13,479	12,287
Total liabilities and stockholders' equity	$ 51,815	$ 51,261