CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 22	$ 80
Marketable securities	1,488	1,250
Total cash and marketable securities	1,510	1,330
Receivables - net	203	152
Inventories and supplies - net	61	60
Deferred income taxes	112	113
Prepaid expenses and other current assets	134	107
Total Current Assets	2,020	1,762
Property and Equipment
Aircraft and other flight equipment	4,993	4,677
Other property and equipment	867	838
Deposits for future flight equipment	431	446
Property and Equipment Total	6,291	5,961
Less accumulated depreciation and amortization	2,189	2,068
Total Property and Equipment - Net	4,102	3,893
Other Assets	192	183
Total Assets	6,314	5,838
Current Liabilities
Accounts payable	71	64
Accrued wages, vacation and payroll taxes	166	211
Other accrued liabilities	706	624
Air traffic liability	807	564
Current portion of long-term debt	114	117
Total Current Liabilities	1,864	1,580
Long-Term Debt, Net of Current Portion	745	754
Other Liabilities and Credits
Deferred income taxes	725	709
Deferred revenue	342	335
Obligation for pension and postretirement medical benefits	123	123
Other liabilities	315	308
Other Liabilities and Credits Totals	1,505	1,475
Commitments and Contingencies
Shareholders' Equity
Preferred stock, $1 par value Authorized: 5,000,000 shares, none issued or outstanding	0	0
Common stock, $0.01 par value, Authorized: 200,000,000 shares, Issued: 2014 - 136,845,596 shares; 2013 - 137,533,382 shares, Outstanding: 2014 - 136,738,034; 2013 - 137,491,906	1	1
Capital in excess of par value	551	606
Treasury stock (common), at cost: 2014 - 107,562 shares; 2013 - 41,476 shares	(5)	(2)
Accumulated other comprehensive (loss)	(178)	(183)
Retained earnings	1,831	1,607
Total Shareholders' Equity	2,200	2,029
Total Liabilities and Shareholders' Equity	$ 6,314	$ 5,838