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OPERATING SEGMENT INFORMATION (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating revenues |  |  |  |  |  |
Total Operating Revenues |  | $ 8,781 | $ 8,264 |  | $ 7,894 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 5,840 | 5,685 |  | 5,239 |
Special items - merger-related costs |  | 44 | 87 |  | 116 |
Economic fuel |  | 1,878 | 1,936 |  | 1,447 |
Total Operating Expenses |  | 7,718 | 7,621 |  | 6,686 |
Non-operating Income (Expense) |  |  |  |  |  |
Interest income |  | 42 | 38 |  | 34 |
Interest expense |  | (78) | (91) |  | (103) |
Interest capitalized |  | 15 | 18 |  | 17 |
Other - net |  | (26) | (23) |  | 3 |
Nonoperating Income (Expense) Total |  | (47) | (58) |  | (49) |
Income (loss) before income tax |  | 1,016 | 585 |  | 1,159 |
Depreciation |  | 423 | 398 |  | 372 |
Total property and equipment additions |  | (696) | (960) |  | (1,026) |
Total assets |  | 12,993 | 10,912 |  |  |
Air Group Adjusted [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Total Operating Revenues | [1] | 8,781 | 8,264 |  | 7,894 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel | [1] | 5,796 | 5,553 |  | 5,123 |
Economic fuel | [1] | 1,884 | 1,914 |  | 1,454 |
Total Operating Expenses | [1] | 7,680 | 7,467 |  | 6,577 |
Non-operating Income (Expense) |  |  |  |  |  |
Interest income |  | 42 | 38 |  | 34 |
Interest expense |  | (78) | (91) |  | (103) |
Interest capitalized |  | 15 | 18 |  | 17 |
Other - net |  | (26) | (23) |  | 3 |
Nonoperating Income (Expense) Total | [1] | (47) | (58) |  | (49) |
Income (loss) before income tax | [1] | 1,054 | 739 |  | 1,268 |
Horizon [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Total Operating Revenues |  | 451 | 512 |  | 430 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 385 | 465 |  | 427 |
Economic fuel |  | 0 | 0 |  | 0 |
Total Operating Expenses |  | 385 | 465 |  | 427 |
Non-operating Income (Expense) |  |  |  |  |  |
Interest income |  | 0 | 0 |  | 0 |
Interest expense |  | (28) | (22) |  | (13) |
Interest capitalized |  | 0 | 2 |  | 2 |
Other - net |  | 0 | 0 |  | 0 |
Nonoperating Income (Expense) Total |  | (28) | (20) |  | (11) |
Income (loss) before income tax |  | 38 | 27 |  | (8) |
Depreciation |  | 86 | 82 |  | 64 |
Total property and equipment additions |  | (91) | (389) |  | (292) |
Total assets |  | 1,266 | 1,229 |  |  |
Parent [Member] |  |  |  |  |  |
Non-operating Income (Expense) |  |  |  |  |  |
Total assets |  | (7,480) | (7,170) |  |  |
Intersegment Eliminations |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Total Operating Revenues |  | (445) | (508) |  | (426) |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | (464) | (513) |  | (427) |
Economic fuel |  | 0 | 0 |  | 0 |
Total Operating Expenses |  | (464) | (513) |  | (427) |
Non-operating Income (Expense) |  |  |  |  |  |
Interest income |  | (24) | (15) |  | (5) |
Interest expense |  | 26 | 13 |  | 2 |
Interest capitalized |  | 0 | 0 |  | 0 |
Other - net |  | 0 | 0 |  | 0 |
Nonoperating Income (Expense) Total |  | 2 | (2) |  | (3) |
Income (loss) before income tax |  | 21 | 3 |  | (2) |
Special Charges [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Total Operating Revenues | [2] | 0 | 0 |  | 0 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 44 | 132 | [2] | 116 | [2]
Economic fuel |  | (6) | 22 | [2] | (7) | [2]
Total Operating Expenses | [2] | 38 | 154 |  | 109 |
Non-operating Income (Expense) |  |  |  |  |  |
Interest income |  | 0 | 0 |  | 0 |
Interest expense |  | 0 | 0 |  | 0 |
Interest capitalized |  | 0 | 0 |  | 0 |
Other - net |  | 0 | 0 |  | 0 |
Nonoperating Income (Expense) Total | [2] | 0 | 0 |  | 0 |
Income (loss) before income tax | [2] | (38) | (154) |  | (109) |
Alaska Mainline [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Total Operating Revenues |  | 7,381 | 7,063 |  | 6,832 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 4,778 | 4,577 |  | 4,271 |
Economic fuel |  | 1,589 | 1,652 |  | 1,282 |
Total Operating Expenses |  | 6,367 | 6,229 |  | 5,553 |
Non-operating Income (Expense) |  |  |  |  |  |
Interest income |  | 66 | 53 |  | 39 |
Interest expense |  | (76) | (82) |  | (92) |
Interest capitalized |  | 15 | 16 |  | 15 |
Other - net |  | (26) | (12) |  | 3 |
Nonoperating Income (Expense) Total |  | (21) | (25) |  | (35) |
Income (loss) before income tax |  | 993 | 809 |  | 1,244 |
Depreciation | [3] | 337 | 316 |  | 308 |
Total property and equipment additions | [3] | (605) | (571) |  | (734) |
Total assets | [3] | 19,207 | 16,853 |  |  |
Alaska Regional [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Total Operating Revenues |  | 1,394 | 1,197 |  | 1,058 |
Operating expenses |  |  |  |  |  |
Operating expenses, excluding fuel |  | 1,097 | 1,024 |  | 852 |
Economic fuel |  | 295 | 262 |  | 172 |
Total Operating Expenses |  | 1,392 | 1,286 |  | 1,024 |
Non-operating Income (Expense) |  |  |  |  |  |
Interest income |  | 0 | 0 |  | 0 |
Interest expense |  | 0 | 0 |  | 0 |
Interest capitalized |  | 0 | 0 |  | 0 |
Other - net |  | 0 | (11) |  | 0 |
Nonoperating Income (Expense) Total |  | 0 | (11) |  | 0 |
Income (loss) before income tax |  | 2 | (100) |  | 34 |
Passenger Revenue [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 8,095 | 7,631 |  | 7,301 |
Passenger Revenue [Member] | Air Group Adjusted [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | [1] | 8,095 | 7,631 |  | 7,301 |
Passenger Revenue [Member] | Horizon [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 0 | 0 |  | 0 |
Passenger Revenue [Member] | Intersegment Eliminations |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 0 | 0 |  | 0 |
Passenger Revenue [Member] | Special Charges [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | [2] | 0 | 0 |  | 0 |
Passenger Revenue [Member] | Alaska Mainline [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 6,750 | 6,474 |  | 6,278 |
Passenger Revenue [Member] | Alaska Regional [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 1,345 | 1,157 |  | 1,023 |
Capacity Purchase Agreements [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 0 | 0 |  | 0 |
Capacity Purchase Agreements [Member] | Air Group Adjusted [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | [1] | 0 | 0 |  | 0 |
Capacity Purchase Agreements [Member] | Horizon [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 450 | 508 |  | 426 |
Capacity Purchase Agreements [Member] | Intersegment Eliminations |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | (450) | (508) |  | (426) |
Capacity Purchase Agreements [Member] | Special Charges [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | [2] | 0 | 0 |  | 0 |
Capacity Purchase Agreements [Member] | Alaska Mainline [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 0 | 0 |  | 0 |
Capacity Purchase Agreements [Member] | Alaska Regional [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 0 | 0 |  | 0 |
Mileage Plan Services, Other [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 465 | 434 |  | 418 |
Mileage Plan Services, Other [Member] | Air Group Adjusted [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | [1] | 465 | 434 |  | 418 |
Mileage Plan Services, Other [Member] | Horizon [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 0 | 0 |  | 0 |
Mileage Plan Services, Other [Member] | Intersegment Eliminations |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 0 | 0 |  | 0 |
Mileage Plan Services, Other [Member] | Special Charges [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | [2] | 0 | 0 |  | 0 |
Mileage Plan Services, Other [Member] | Alaska Mainline [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 419 | 397 |  | 387 |
Mileage Plan Services, Other [Member] | Alaska Regional [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 46 | 37 |  | 31 |
Cargo and Freight [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 221 | 199 |  | 175 |
Cargo and Freight [Member] | Air Group Adjusted [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | [1] | 221 | 199 |  | 175 |
Cargo and Freight [Member] | Horizon [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 1 | 4 |  | 4 |
Cargo and Freight [Member] | Intersegment Eliminations |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 5 | 0 |  | 0 |
Cargo and Freight [Member] | Special Charges [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | [2] | 0 | 0 |  | 0 |
Cargo and Freight [Member] | Alaska Mainline [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 212 | 192 |  | 167 |
Cargo and Freight [Member] | Alaska Regional [Member] |  |  |  |  |  |
Operating revenues |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | $ 3 | $ 3 |  | $ 4 |
[1] |
| Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |
| Mainline |  | Regional |  | Horizon |  | Consolidating & Other(a) |  | Air Group Adjusted(b) |  | Special Items(c) |  | Consolidated
Operating Revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Passenger revenues | 6,278 |  |  | 1,023 |  |  | — |  |  | — |  |  | 7,301 |  |  | — |  |  | 7,301 |
CPA revenues | — |  |  | — |  |  | 426 |  |  | (426) |  |  | — |  |  | — |  |  | — |
Mileage Plan other revenue | 387 |  |  | 31 |  |  | — |  |  | — |  |  | 418 |  |  | — |  |  | 418 |
Cargo and other | 167 |  |  | 4 |  |  | 4 |  |  | — |  |  | 175 |  |  | — |  |  | 175 |
Total Operating Revenues | 6,832 |  |  | 1,058 |  |  | 430 |  |  | (426) |  |  | 7,894 |  |  | — |  |  | 7,894 |
Operating Expenses |  |  |  |  |  |  |  |  |  |  |  |  |
Non-fuel operating expenses | 4,271 |  |  | 852 |  |  | 427 |  |  | (427) |  |  | 5,123 |  |  | 116 |  |  | 5,239 |
Fuel expense | 1,282 |  |  | 172 |  |  | — |  |  | — |  |  | 1,454 |  |  | (7) |  |  | 1,447 |
Total Operating Expenses | 5,553 |  |  | 1,024 |  |  | 427 |  |  | (427) |  |  | 6,577 |  |  | 109 |  |  | 6,686 |
Non-operating Income (Expense) |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income | 39 |  |  | — |  |  | — |  |  | (5) |  |  | 34 |  |  | — |  |  | 34 |
Interest expense | (92) |  |  | — |  |  | (13) |  |  | 2 |  |  | (103) |  |  | — |  |  | (103) |
Interest capitalized | 15 |  |  | — |  |  | 2 |  |  | — |  |  | 17 |  |  | — |  |  | 17 |
Other | 3 |  |  | — |  |  | — |  |  | — |  |  | 3 |  |  | — |  |  | 3 |
Total Non-operating Income (Expense) | (35) |  |  | — |  |  | (11) |  |  | (3) |  |  | (49) |  |  | — |  |  | (49) |
Income (Loss) Before Income Tax | $ | 1,244 |  |  | $ | 34 |  |  | $ | (8) |  |  | $ | (2) |  |  | $ | 1,268 |  |  | $ | (109) |  |  | $ | 1,159 |
[2] |
| Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |
| Mainline |  | Regional |  | Horizon |  | Consolidating & Other(a) |  | Air Group Adjusted(b) |  | Special Items(c) |  | Consolidated
Operating Revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Passenger revenues | 6,278 |  |  | 1,023 |  |  | — |  |  | — |  |  | 7,301 |  |  | — |  |  | 7,301 |
CPA revenues | — |  |  | — |  |  | 426 |  |  | (426) |  |  | — |  |  | — |  |  | — |
Mileage Plan other revenue | 387 |  |  | 31 |  |  | — |  |  | — |  |  | 418 |  |  | — |  |  | 418 |
Cargo and other | 167 |  |  | 4 |  |  | 4 |  |  | — |  |  | 175 |  |  | — |  |  | 175 |
Total Operating Revenues | 6,832 |  |  | 1,058 |  |  | 430 |  |  | (426) |  |  | 7,894 |  |  | — |  |  | 7,894 |
Operating Expenses |  |  |  |  |  |  |  |  |  |  |  |  |
Non-fuel operating expenses | 4,271 |  |  | 852 |  |  | 427 |  |  | (427) |  |  | 5,123 |  |  | 116 |  |  | 5,239 |
Fuel expense | 1,282 |  |  | 172 |  |  | — |  |  | — |  |  | 1,454 |  |  | (7) |  |  | 1,447 |
Total Operating Expenses | 5,553 |  |  | 1,024 |  |  | 427 |  |  | (427) |  |  | 6,577 |  |  | 109 |  |  | 6,686 |
Non-operating Income (Expense) |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income | 39 |  |  | — |  |  | — |  |  | (5) |  |  | 34 |  |  | — |  |  | 34 |
Interest expense | (92) |  |  | — |  |  | (13) |  |  | 2 |  |  | (103) |  |  | — |  |  | (103) |
Interest capitalized | 15 |  |  | — |  |  | 2 |  |  | — |  |  | 17 |  |  | — |  |  | 17 |
Other | 3 |  |  | — |  |  | — |  |  | — |  |  | 3 |  |  | — |  |  | 3 |
Total Non-operating Income (Expense) | (35) |  |  | — |  |  | (11) |  |  | (3) |  |  | (49) |  |  | — |  |  | (49) |
Income (Loss) Before Income Tax | $ | 1,244 |  |  | $ | 34 |  |  | $ | (8) |  |  | $ | (2) |  |  | $ | 1,268 |  |  | $ | (109) |  |  | $ | 1,159 |
[3] | INCOME TAXES Deferred Income Taxes Deferred income taxes reflect the impact of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and such amounts for tax purposes. The Company has a net deferred tax liability, primarily due to differences in depreciation rates for federal income tax purposes and for financial reporting purposes. Deferred tax (assets) and liabilities comprise the following (in millions):
| 2019 |  | 2018
Excess of tax over book depreciation | $ | 1,233 |  |  | $ | 1,066 |
Intangibles - net | 16 |  |  | 15 |
Operating lease liabilities | 416 |  |  | — |
Other - net | 58 |  |  | 43 |
Deferred tax liabilities | 1,723 |  |  | 1,124 |
Mileage Plan™ | (337) |  |  | (315) |
Inventory obsolescence | (15) |  |  | (15) |
Employee benefits | (179) |  |  | (172) |
Acquired net operating losses | (13) |  |  | (64) |
Operating lease assets | (417) |  |  | — |
Other - net | (48) |  |  | (48) |
Deferred tax assets | (1,009) |  |  | (614) |
Valuation allowance | 1 |  |  | 2 |
Net deferred tax liabilities | $ | 715 |  |  | $ | 512 |
At December 31, 2019, the Company had federal NOLs of approximately $45 million that expire beginning in 2032 and continuing through 2036, and state NOLs of approximately $55 million that expire beginning in 2029 and continuing through 2036. Virgin America experienced multiple “ownership changes” as defined in Section 382 of the Internal Revenue Code of 1986, as amended (the “Code”), the most recent being its acquisition by the Company. Section 382 of the Code imposes an annual limitation on the utilization of pre-ownership change NOLs. Any unused annual limitation may, subject to certain limits, be carried over to later years. The combined Company’s ability to use the NOLs will also depend on the amount of taxable income generated in future periods. Valuation allowances are provided to reduce the related deferred income tax assets to an amount which will, more likely than not, be realized. The valuation allowance was not material at both December 31, 2019 and December 31, 2018. Components of Income Tax Expense The components of income tax expense are as follows (in millions):
| 2019 |  | 2018 |  | 2017
Current income tax expense (benefit): |  |  |  |  |
Federal | $ | 26 |  |  | $ | (5) |  |  | $ | 127 |
State | 13 |  |  | 9 |  |  | 35 |
Total current income tax expense | 39 |  |  | 4 |  |  | 162 |
Deferred income tax expense (benefit): |  |  |  |  |  |  |  |
Federal | 175 |  |  | 125 |  |  | (3) |
State | 33 |  |  | 19 |  |  | 40 |
Total deferred income tax expense (benefit) | 208 |  |  | 144 |  |  | 37 |
Income tax expense | $ | 247 |  |  | $ | 148 |  |  | $ | 199 |
Income Tax Rate Reconciliation Income tax expense reconciles to the amount computed by applying the 2019 U.S. federal rate of 21% to income before income tax and for deferred taxes as follows (in millions):
| 2019 |  | 2018 |  | 2017
Income before income tax | $ | 1,016 |  |  | $ | 585 |  |  | $ | 1,159 |
Expected tax expense | 213 |  |  | 123 |  |  | 406 |
Nondeductible expenses | 9 |  |  | 9 |  |  | 5 |
State income taxes | 36 |  |  | 21 |  |  | 28 |
State income sourcing | 1 |  |  | — |  |  | 9 |
Tax law changes | (9) |  |  | (7) |  |  | (237) |
Other - net | (3) |  |  | 2 |  |  | (12) |
Actual tax expense | $ | 247 |  |  | $ | 148 |  |  | $ | 199 |
Effective tax rate | 24.3 | % |  | 25.3 | % |  | 17.2 | %
As a result of the ASC 606 full retrospective adoption, 2017 tax expense increased by $26 million. As a result of tax changes signed into law during 2017, with final regulations issued in 2019, the Company recorded a deferred tax benefit of $9 million in the current year. In 2017, adjustments were made to the Company's position on income sourcing in various states due to updated guidance from state taxing authorities. The impact of this guidance is reflected as an increase in income tax expense of approximately $9 million for the year ended December 31, 2017. Uncertain Tax Positions The Company has identified its federal tax return and its state tax returns in Alaska, Oregon and California as “major” tax jurisdictions. A summary of the Company's jurisdictions and the periods that are subject to examination are as follows:
Jurisdiction | Period
Federal | 2007 to 2018
Alaska | 2015 to 2018
California | 2007 to 2018
Oregon | 2003 to 2018
Certain tax years are open to the extent of net operating loss carryforwards. Changes in the liability for gross unrecognized tax benefits during 2019, 2018 and 2017 are as follows (in millions):
| 2019 |  | 2018 |  | 2017
Balance at January 1, | $ | 40 |  |  | $ | 43 |  |  | $ | 40 |
Additions related to prior years | — |  |  | 1 |  |  | 16 |
Releases related to prior years | (1) |  |  | (4) |  |  | (2) |
Additions related to current year activity | 2 |  |  | 2 |  |  | 2 |
Releases due to settlements | — |  |  | (1) |  |  | (11) |
Releases due to lapse of statute of limitations | (1) |  |  | (1) |  |  | (2) |
Balance at December 31, | $ | 40 |  |  | $ | 40 |  |  | $ | 43 |
As of December 31, 2019, the Company had $40 million of accrued tax contingencies, of which $34 million, if fully recognized, would decrease the effective tax rate. As of December 31, 2019, 2018 and 2017, the Company has accrued interest and penalties, net of federal income tax benefit, of $7 million, $6 million, and $5 million. In 2019, 2018, and 2017, the Company recognized an expense of $1 million, $1 million, and $2 million for interest and penalties, net of federal income tax benefit. At December 31, 2019, the Company has unrecognized tax benefits recorded as a liability and some reducing deferred tax assets. The Company's reserves for uncertain tax positions is unchanged in 2019 after statute lapses on reserves and current year activity. These uncertain tax positions could change as a result of the Company's ongoing audits, settlement of issues, new audits and status of other taxpayer court cases. The Company cannot predict the timing of these actions. Due to the positions being taken in various jurisdictions, the amounts currently accrued are the Company's best estimate as of December 31, 2019.

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- Definition Operating Expenses, Excluding Fuel + References No definition available. + Details
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Namespace Prefix: | alk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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