CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents	$ 27.5	$ 102.2
Marketable securities	1,158.1	1,038.7
Total cash and marketable securities	1,185.6	1,140.9
Receivables - net	185.4	136.4
Inventories and supplies - net	52.5	44.3
Deferred income taxes	141.5	134.2
Fuel hedge contracts	35.4	46.7
Prepaid expenses and other current assets	116.1	93.0
Property and Equipment
Aircraft and other flight equipment	4,118.9	4,041.8
Other property and equipment	848.5	762.3
Deposits for future flight equipment	385.4	262.5
Less accumulated depreciation and amortization	1,805.3	1,665.1
Fuel Hedge Contracts	43.1	70.2
Other Assets	129.0	127.8
Total Assets	5,436.1	5,195.0
Current Liabilities
Accounts payable	70.2	103.6
Accrued aircraft rent	7.8	31.6
Accrued wages, vacation and payroll taxes	163.0	163.8
Other accrued liabilities	537.0	513.3
Air traffic liability	583.6	489.4
Current portion of long-term debt	167.2	207.9
Long-Term Debt, Net of Current Portion	898.9	1,099.0
Other Liabilities and Credits
Deferred income taxes	484.9	362.9
Deferred revenue	423.4	410.2
Obligation for pension and postretirement medical benefits	447.9	463.4
Other liabilities	213.0	176.7
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: 2012 - 70,164,726 shares; 2011 - 75,733,044 shares	70.2	75.7
Capital in excess of par value	660.3	802.2
Treasury stock (common), at cost: 2012 - 0 shares; 2011 - 4,783,494 shares	0	(125.3)
Accumulated other comprehensive loss	(373.6)	(390.0)
Retained earnings	1,082.3	810.6
Total Shareholders' Equity		$ 1,173.2