Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 3,940	$ 2,548
Short-term investments	1,605	1,524
Accounts and other receivables	709	1,086
Inventories of parts and supplies, at cost	518	529
Prepaid expenses and other current assets	256	287
Total current assets	7,028	5,974
Property and equipment, at cost:
Flight equipment	21,580	21,629
Ground property and equipment	5,818	5,672
Deposits on flight equipment purchase contracts	305	248
Assets constructed for others	198	164
Property and equipment, at cost	27,901	27,713
Less allowance for depreciation and amortization	10,912	10,688
Property and equipment, net	16,989	17,025
Goodwill	970	970
Operating lease right-of-use assets	1,278	1,349
Other assets	620	577
Total assets	26,885	25,895
Current liabilities:
Accounts payable	1,043	1,574
Accrued liabilities	1,037	1,749
Current operating lease liabilities	330	353
Air traffic liability	5,036	4,457
Current maturities of long-term debt	2,795	819
Total current liabilities	10,241	8,952
Long-term debt less current maturities	2,288	1,846
Air traffic liability - noncurrent	1,175	1,053
Deferred income taxes	2,278	2,364
Construction obligation	198	164
Noncurrent operating lease liabilities	936	978
Other noncurrent liabilities	694	706
Stockholders' equity:
Common stock	808	808
Capital in excess of par value	1,582	1,581
Retained earnings	17,757	17,945
Accumulated other comprehensive loss	(186)	(61)
Treasury stock, at cost	(10,886)	(10,441)
Total stockholders' equity	9,075	9,832
Total liabilities and stockholders' equity	$ 26,885	$ 25,895