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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Current Assets |  |
Cash and cash equivalents | $ 177 | $ 194
Marketable securities | 1,351 | 1,427
Total cash and marketable securities | 1,528 | 1,621
Receivables—net | 350 | 341
Inventories and supplies—net | 62 | 57
Prepaid expenses and other current assets | 174 | 133
Total Current Assets | 2,114 | 2,152
Property and Equipment |  |
Aircraft and other flight equipment | 7,567 | 7,559
Other property and equipment | 1,287 | 1,222
Deposits for future flight equipment | 560 | 494
Property and Equipment Total | 9,414 | 9,275
Less accumulated depreciation and amortization | 3,011 | 2,991
Total Property and Equipment—Net | 6,403 | 6,284
Goodwill | 1,943 | 1,943
Intangible assets | 132 | 133
Other noncurrent assets | 256 | 234
Other Assets | 2,331 | 2,310
Total Assets | 10,848 | 10,746
Current Liabilities |  |
Accounts payable | 102 | 120
Accrued wages, vacation and payroll taxes | 299 | 418
Air traffic liability | 1,122 | 806
Other accrued liabilities | 433 | 400
Deferred revenue, current | 649 | 635
Current portion of long-term debt | 387 | 307
Total Current Liabilities | 2,992 | 2,686
Long-Term Debt, Net of Current Portion | 2,062 | 2,262
Other Liabilities and Credits |  |
Deferred income taxes | 372 | 370
Deferred revenue, noncurrent | 1,102 | 1,090
Obligation for pension and postretirement medical benefits | 458 | 453
Other liabilities | 423 | 425
Other Liabilities and Credits Totals | 2,355 | 2,338
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: 400,000,000 shares, Issued: 2018 - 130,378,645 shares; 2017 - 129,903,498 shares, Outstanding: 2018 - 123,350,124 shares; 2017 - 123,060,638 shares | 1 | 1
Capital in excess of par value | 190 | 164
Treasury stock (common), at cost: 2018 - 7,028,521 shares; 2017 - 6,842,860 shares | (531) | (518)
Accumulated other comprehensive loss | (440) | (380)
Retained earnings | 4,219 | 4,193
Total Shareholders' Equity | 3,439 | 3,460
Total Liabilities and Shareholders' Equity | $ 10,848 | $ 10,746

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