Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 2,446	$ 1,854
Short-term investments	1,540	1,835
Accounts and other receivables	777	568
Inventories of parts and supplies, at cost	510	461
Prepaid expenses and other current assets	281	310
Total current assets	5,554	5,028
Property and equipment, at cost:
Flight equipment	21,707	21,753
Ground property and equipment	5,228	4,960
Deposits on flight equipment purchase contracts	818	775
Assets constructed for others	144	1,768
Property and equipment, at cost	27,897	29,256
Less allowance for depreciation and amortization	10,164	9,731
Property and equipment, net	17,733	19,525
Goodwill	970	970
Operating lease right-of-use assets	1,424	0
Other assets	693	720
Total assets	26,374	26,243
Current liabilities:
Accounts payable	1,330	1,416
Accrued liabilities	1,315	1,749
Current operating lease liabilities	350	0
Air traffic liability	4,962	4,134
Current maturities of long-term debt	654	606
Total current liabilities	8,611	7,905
Long-term debt less current maturities	2,449	2,771
Air traffic liability - noncurrent	1,022	936
Deferred income taxes	2,497	2,427
Construction obligation	144	1,701
Noncurrent operating lease liabilities	1,072	0
Other noncurrent liabilities	639	650
Stockholders' equity:
Common stock	808	808
Capital in excess of par value	1,534	1,510
Retained earnings	16,962	15,967
Accumulated other comprehensive income	30	20
Treasury stock, at cost	(9,394)	(8,452)
Total stockholders' equity	9,940	9,853
Total liabilities and stockholders' equity	$ 26,374	$ 26,243