Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 8,307	$ 2,882
Short-term investments	5,789	0
Accounts receivable, net of an allowance for uncollectible accounts of $89 and $13 as of 2020 and 2019, respectively	1,396	2,854
Fuel inventory	377	730
Expendable parts and supplies inventories, net of an allowance for obsolescence of $188 and $82 as of 2020 and 2019, respectively	355	521
Prepaid expenses and other	1,180	1,262
Total current assets	17,404	8,249
Noncurrent Assets:
Property and equipment, net of accumulated depreciation and amortization of $17,511 and $17,027 as of 2020 and 2019, respectively	26,529	31,310
Operating lease right-of-use assets	5,733	5,627
Goodwill	9,753	9,781
Identifiable intangibles, net of accumulated amortization of $883 and $873 as of 2020 and 2019, respectively	6,011	5,163
Cash restricted for airport construction	1,556	636
Equity investments	1,665	2,568
Deferred income taxes, net	1,988	120
Other noncurrent assets	1,357	1,078
Total noncurrent assets	54,592	56,283
Total assets	71,996	64,532
Current Liabilities:
Current maturities of debt and finance leases	1,732	2,287
Current maturities of operating leases	678	801
Accounts payable	2,840	3,266
Accrued salaries and related benefits	2,086	3,701
Fuel card obligation	1,100	736
Other accrued liabilities	1,670	1,078
Total current liabilities	15,927	20,204
Noncurrent Liabilities:
Debt and finance leases	27,425	8,873
Pension, postretirement and related benefits	10,630	8,452
Noncurrent operating leases	5,713	5,294
Deferred income taxes, net	0	1,456
Other noncurrent liabilities	4,862	1,386
Total noncurrent liabilities	54,535	28,970
Commitments and Contingencies
Stockholders' Equity:
Common stock at $0.0001 par value; 1,500,000,000 shares authorized, 647,352,203 and 651,731,443 shares issued as of 2020 and 2019, respectively	0	0
Additional paid-in capital	11,259	11,129
Retained earnings/(deficit)	(428)	12,454
Accumulated other comprehensive loss	(9,038)	(7,989)
Treasury stock, at cost, 9,169,683 and 8,959,730 shares as of 2020 and 2019, respectively	(259)	(236)
Total stockholders' equity	1,534	15,358
Total liabilities and stockholders' equity	71,996	64,532
Air traffic
Current Liabilities:
Deferred revenue liability, current	4,044	5,116
Noncurrent Liabilities:
Deferred revenue liability, noncurrent	500	0
Loyalty program
Current Liabilities:
Deferred revenue liability, current	1,777	3,219
Noncurrent Liabilities:
Deferred revenue liability, noncurrent	$ 5,405	$ 3,509