Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 12,480	$ 11,063
Short-term investments	3,024	2,271
Accounts and other receivables	1,357	1,130
Inventories of parts and supplies, at cost	537	414
Prepaid expenses and other current assets	638	295
Total current assets	18,036	15,173
Property and equipment, at cost:
Flight equipment	21,226	20,877
Ground property and equipment	6,342	6,083
Deposits on flight equipment purchase contracts	0	305
Assets constructed for others	6	309
Property and equipment, at cost	27,574	27,574
Less allowance for depreciation and amortization	12,732	11,743
Property and equipment, net	14,842	15,831
Goodwill	970	970
Operating	1,590	1,892
Other assets	882	722
Total assets	36,320	34,588
Current liabilities:
Accounts payable	1,282	931
Accrued liabilities	1,624	2,259
Current operating lease liabilities	239	306
Air traffic liability	5,566	3,790
Current maturities of long-term debt	453	220
Total current liabilities	9,164	7,506
Long-term debt less current maturities	10,274	10,111
Air traffic liability - noncurrent	2,159	3,343
Deferred income taxes	1,770	1,634
Construction obligation	0	309
Operating	1,315	1,562
Other noncurrent liabilities	1,224	1,247
Stockholders' equity:
Common stock, $1.00 par value: 2,000,000,000 shares authorized; 888,111,634 shares issued in 2021 and 2020	888	888
Capital in excess of par value	4,224	4,191
Retained earnings	15,774	14,777
Accumulated other comprehensive income (loss)	388	(105)
Treasury stock, at cost: 295,991,525 and 297,637,297 shares in 2021 and 2020, respectively	(10,860)	(10,875)
Total stockholders' equity	10,414	8,876
Total liabilities and stockholders' equity	$ 36,320	$ 34,588