CONSOLIDATED BALANCE SHEETS (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Current Assets
Cash and cash equivalents	$ 67.0	$ 89.5
Marketable securities	1,086.5	1,118.7
Total cash and marketable securities	1,153.5	1,208.2
Receivables - net	167.8	120.1
Inventories and supplies - net	52.6	45.1
Deferred income taxes	126.4	120.5
Fuel hedge contracts	71.4	61.4
Prepaid expenses and other current assets	104.0	106.7
Total Current Assets	1,675.7	1,662.0
Property and Equipment
Aircraft and other flight equipment	4,065.8	3,807.6
Other property and equipment	621.7	616.5
Deposits for future flight equipment	165.5	202.5
Property and Equipment Total	4,853.0	4,626.6
Less accumulated depreciation and amortization	1,603.1	1,509.5
Total Property and Equipment - Net	3,249.9	3,117.1
Fuel Hedge Contracts	84.9	69.9
Other Assets	223.3	167.6
Total Assets	5,233.8	5,016.6
Current Liabilities
Accounts payable	71.3	60.2
Accrued aircraft rent	28.1	43.1
Accrued wages, vacation and payroll taxes	136.2	176.6
Other accrued liabilities	544.0	501.2
Air traffic liability	594.5	422.4
Current portion of long-term debt	253.9	221.2
Total Current Liabilities	1,628.0	1,424.7
Long-term debt, net of current portion	1,154.9	1,313.0
Other Liabilities and Credits
Deferred income taxes	347.9	279.9
Deferred revenue	386.7	403.5
Obligation for pension and postretirement medical benefits	361.2	367.1
Other liabilities	148.6	123.0
Other Liabilities and Credits Totals	1,244.4	1,173.5
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: 2011 - 37,689,589 shares; 2010 - 37,010,140 shares	37.7	37.0
Capital in excess of par value	838.9	815.5
Treasury stock (common), at cost: 2011 - 1,626,547 shares; 2010 - 1,086,172 shares	(79.2)	(46.0)
Accumulated other comprehensive loss	(260.0)	(267.2)
Retained earnings	669.1	566.1
Shareholders' Equity	1,206.5	1,105.4
Total Liabilities and Shareholders' Equity	$ 5,233.8	$ 5,016.6