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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Current Assets |  |
Cash and cash equivalents | $ 470 | $ 1,370
Marketable securities | 2,646 | 1,976
Total cash and marketable securities | 3,116 | 3,346
Receivables - net | 546 | 480
Inventories and supplies - net | 62 | 57
Prepaid expenses and other current assets | 196 | 123
Total Current Assets | 3,920 | 4,006
Property and Equipment |  |
Aircraft and other flight equipment | 8,127 | 7,761
Other property and equipment | 1,489 | 1,398
Deposits for future flight equipment | 384 | 583
Property and Equipment | 10,000 | 9,742
Less accumulated depreciation and amortization | 3,862 | 3,531
Total Property and Equipment - Net | 6,138 | 6,211
Other Assets |  |
Operating Lease, Right-of-Use Asset | 1,453 | 1,400
Goodwill and intangible assets | 2,044 | 2,050
Other noncurrent assets | 396 | 379
Total Other Assets | 3,893 | 3,829
Total Assets | 13,951 | 14,046
Current Liabilities |  |
Accounts payable | 200 | 108
Accrued wages, vacation and payroll taxes | 457 | 527
Other accrued liabilities | 625 | 424
Operating Lease, Liability, Current | 268 | 290
Current portion of long-term debt | 366 | 1,138
Total Current Liabilities | 3,991 | 4,293
Long-Term Debt, Net of Current Portion | 2,173 | 2,357
Other Liabilities and Credits |  |
Operating Lease, Liability, Noncurrent | 1,279 | 1,268
Deferred Income Tax Liabilities, Net | 578 | 407
Deferred revenue | 1,446 | 1,544
Obligation for pension and postretirement medical benefits | 305 | 665
Other liabilities | 378 | 524
Total Other Liabilities and Credits | 3,986 | 4,408
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: 2021 - 135,255,808 shares; 2020 - 133,567,534 shares, Outstanding: 2021 - 125,905,864 shares; 2020 - 124,217,590 shares | 1 | 1
Capital in excess of par value | 494 | 391
Treasury stock (common), at cost: 2021 - 9,349,944 shares; 2020 - 9,349,944 shares | (674) | (674)
Accumulated other comprehensive loss | (262) | (494)
Retained earnings | 4,242 | 3,764
Shareholders' Equity Total | 3,801 | 2,988
Total Liabilities and Shareholders' Equity | $ 13,951 | 14,046
Common stock, shares authorized | 400,000,000 |
Common stock, par value | $ 0.01 |
Air Traffic Liability |  |
Current Liabilities |  |
Air traffic liability | $ 1,163 | 1,073
Mileage Plan Revenue [Member] |  |
Current Liabilities |  |
Air traffic liability | $ 912 | $ 733

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