CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 88	$ 107
Marketable securities	1,170	1,110
Total cash and marketable securities	1,258	1,217
Receivables - net	205	259
Inventories and supplies - net	52	58
Deferred income taxes	126	117
Prepaid expenses and other current assets	74	105
Total Current Assets	1,715	1,756
Property and Equipment
Aircraft and other flight equipment	5,557	5,165
Other property and equipment	936	896
Deposits for future flight equipment	775	555
Property and Equipment Total	7,268	6,616
Less accumulated depreciation and amortization	2,534	2,317
Total Property and Equipment - Net	4,734	4,299
Other Assets	115	126
Total Assets	6,564	6,181
Current Liabilities
Accounts payable	61	62
Accrued wages, vacation and payroll taxes	218	232
Other accrued liabilities	698	629
Air traffic liability	760	631
Current portion of long-term debt	117	117
Total Current Liabilities	1,854	1,671
Long-Term Debt, Net of Current Portion	593	686
Other Liabilities and Credits
Deferred income taxes	746	750
Deferred revenue	416	374
Obligation for pension and postretirement medical benefits	249	246
Other liabilities	341	327
Other Liabilities and Credits Totals	$ 1,752	$ 1,697
Commitments and Contingencies
Shareholders' Equity
Preferred stock, $0.01 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: 2015 - 128,409,720 shares; 2014 - 131,556,573 shares, Outstanding: 2015 - 126,701,469 shares; 2014 - 131,481,473	1	1
Capital in excess of par value	70	296
Treasury stock (common), at cost: 2015 - 1,708,251 shares; 2014 - 75,100 shares	(127)	(4)
Accumulated other comprehensive loss	(303)	(310)
Retained earnings	2,724	2,144
Total Shareholders' Equity	2,365	2,127
Total Liabilities and Shareholders' Equity	$ 6,564	$ 6,181