CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 80	$ 122
Marketable securities	1,250	1,130
Total cash and marketable securities	1,330	1,252
Receivables - less allowance for doubtful accounts of $0 and $1	152	130
Inventories and supplies - net	60	58
Deferred income taxes	113	148
Fuel hedge contracts	12	26
Prepaid expenses and other current assets	95	123
Total Current Assets	1,762	1,737
Property and Equipment
Aircraft and other flight equipment	4,677	4,248
Other property and equipment	838	855
Deposits for future flight equipment	446	369
Property and Equipment Total	5,961	5,472
Less accumulated depreciation and amortization	2,068	1,863
Total Property and Equipment - Net	3,893	3,609
Fuel Hedge Contracts	4	39
Other Assets	179	120
Total Assets	5,838	5,505
Current Liabilities
Accounts payable	64	65
Accrued aircraft rent	12	18
Accrued wages, vacation and payroll taxes	211	184
Other accrued liabilities	612	539
Air traffic liability	564	534
Current portion of long-term debt	117	161
Total Current Liabilities	1,580	1,501
Long-Term Debt, Net of Current Portion	754	871
Other Liabilities and Credits
Deferred income taxes	709	446
Deferred revenue	335	443
Obligation for pension and postretirement medical benefits	123	489
Other liabilities	308	334
Other Liabilities and Credits Totals	1,475	1,712
Commitments and Contingencies
Shareholders' Equity
Preferred stock, $1 par value Authorized: 5,000,000 shares, none issued or outstanding	0	0
Common stock, $1 par value Authorized: 100,000,000 shares, Issued: 2013 - 68,766,691 shares; 2012 - 70,376,543 shares, Outstanding: 2013 - 68,745,953 shares; 2012 - 70,376,543 shares	69	70
Capital in excess of par value	538	660
Treasury stock (common), at cost: 2013 - 20,738 shares; 2012 - 0 shares	(2)	0
Accumulated other comprehensive loss	(183)	(436)
Retained earnings	1,607	1,127
Shareholders' Equity Total	2,029	1,421
Total Liabilities and Shareholders' Equity	$ 5,838	$ 5,505