CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 34	$ 80
Marketable securities	1,309	1,250
Total cash and marketable securities	1,343	1,330
Receivables - net	178	152
Inventories and supplies - net	64	60
Deferred income taxes	114	113
Prepaid expenses and other current assets	100	107
Total Current Assets	1,799	1,762
Property and Equipment
Aircraft and other flight equipment	5,100	4,677
Other property and equipment	883	838
Deposits for future flight equipment	511	446
Property and Equipment Total	6,494	5,961
Less accumulated depreciation and amortization	2,250	2,068
Total Property and Equipment - Net	4,244	3,893
Other Assets	193	183
Total Assets	6,236	5,838
Current Liabilities
Accounts payable	68	64
Accrued wages, vacation and payroll taxes	201	211
Other accrued liabilities	680	624
Air traffic liability	703	564
Current portion of long-term debt	115	117
Total Current Liabilities	1,767	1,580
Long-Term Debt, Net of Current Portion	710	754
Other Liabilities and Credits
Deferred income taxes	738	709
Deferred revenue	356	335
Obligation for pension and postretirement medical benefits	124	123
Other liabilities	312	308
Other Liabilities and Credits Totals	1,530	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 - 133,584,527 shares; 2013 - 137,533,382 shares, Outstanding: 2014 - 133,468,522 shares; 2013 - 137,491,906	1	1
Capital in excess of par value	399	606
Treasury stock (common), at cost: 2014 - 116,005 shares; 2013 - 41,476 shares	(5)	(2)
Accumulated other comprehensive (loss)	(178)	(183)
Retained earnings	2,012	1,607
Total Shareholders' Equity	2,229	2,029
Total Liabilities and Shareholders' Equity	$ 6,236	$ 5,838