Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 2,344	$ 1,854
Short-term investments	1,517	1,835
Accounts and other receivables	784	568
Inventories of parts and supplies, at cost	484	461
Prepaid expenses and other current assets	354	310
Total current assets	5,483	5,028
Property and equipment, at cost:
Flight equipment	21,666	21,753
Ground property and equipment	5,082	4,960
Deposits on flight equipment purchase contracts	780	775
Assets constructed for others	120	1,768
Property and equipment, at cost	27,648	29,256
Less allowance for depreciation and amortization	9,875	9,731
Property and equipment, net	17,773	19,525
Goodwill	970	970
Operating lease right-of-use assets	1,508	0
Other assets	725	720
Total assets	26,459	26,243
Current liabilities:
Accounts payable	1,412	1,416
Accrued liabilities	1,350	1,749
Current operating lease liabilities	361	0
Air traffic liability	5,029	4,134
Current maturities of long-term debt	571	606
Total current liabilities	8,723	7,905
Long-term debt less current maturities	2,602	2,771
Air traffic liability - noncurrent	985	936
Deferred income taxes	2,480	2,427
Construction obligation	120	1,701
Noncurrent operating lease liabilities	1,150	0
Other noncurrent liabilities	608	650
Stockholders' equity:
Common stock	808	808
Capital in excess of par value	1,513	1,510
Retained earnings	16,320	15,967
Accumulated other comprehensive income	96	20
Treasury stock, at cost	(8,946)	(8,452)
Total stockholders' equity	9,791	9,853
Total liabilities and stockholders' equity	$ 26,459	$ 26,243