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v3.19.1

OPERATING SEGMENT INFORMATION (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 USD ($) segment | Mar. 31, 2018 USD ($)
Segment Reporting Information [Line Items] |  |
Number of Operating Segments | segment | 3 |
Operating Revenues |  |
Total Operating Revenues | $ 1,876 | $ 1,832
Operating expenses |  |
Operating Expenses, Excluding Fuel | 1,431 | 1,394
Economic fuel | 420 | 409
Total Operating Expenses | 1,851 | 1,803
Nonoperating Income (Expense) |  |
Interest income | 9 | 8
Interest expense | (22) | (24)
Interest Costs Capitalized | 4 | 5
Other | (10) | (12)
Nonoperating Income (Expense) Total | (19) | (23)
Income (loss) before income tax | 6 | 6
Air Group Adjusted [Member] |  |
Operating Revenues |  |
Total Operating Revenues | 1,876 | 1,832
Operating expenses |  |
Operating Expenses, Excluding Fuel | 1,405 | 1,363
Economic fuel | 424 | 422
Total Operating Expenses | 1,829 | 1,785
Nonoperating Income (Expense) |  |
Interest income | 9 | 8
Interest expense | (22) | (24)
Interest Costs Capitalized | 4 | 5
Other | (10) | (12)
Nonoperating Income (Expense) Total | (19) | (23)
Income (loss) before income tax | 28 | 24
Alaska Mainline [Member] |  |
Operating Revenues |  |
Total Operating Revenues | 1,570 | 1,579
Operating expenses |  |
Operating Expenses, Excluding Fuel | 1,152 | 1,131
Economic fuel | 358 | 367
Total Operating Expenses | 1,510 | 1,498
Nonoperating Income (Expense) |  |
Interest income | 16 | 11
Interest expense | (21) | (22)
Interest Costs Capitalized | 4 | 4
Other | (10) | (5)
Nonoperating Income (Expense) Total | (11) | (12)
Income (loss) before income tax | 49 | 69
Alaska Regional [Member] |  |
Operating Revenues |  |
Total Operating Revenues | 305 | 252
Operating expenses |  |
Operating Expenses, Excluding Fuel | 274 | 239
Economic fuel | 66 | 55
Total Operating Expenses | 340 | 294
Nonoperating Income (Expense) |  |
Interest income | 0 | 0
Interest expense | 0 | 0
Interest Costs Capitalized | 0 | 0
Other | 0 | (7)
Nonoperating Income (Expense) Total | 0 | (7)
Income (loss) before income tax | (35) | (49)
Horizon [Member] |  |
Operating Revenues |  |
Total Operating Revenues | 117 | 111
Operating expenses |  |
Operating Expenses, Excluding Fuel | 97 | 104
Economic fuel | 0 | 0
Total Operating Expenses | 97 | 104
Nonoperating Income (Expense) |  |
Interest income | 0 | 0
Interest expense | (8) | (5)
Interest Costs Capitalized | 0 | 1
Other | 0 | 0
Nonoperating Income (Expense) Total | (8) | (4)
Income (loss) before income tax | 12 | 3
Intersegment Elimination [Member] |  |
Operating Revenues |  |
Total Operating Revenues | (116) | (110)
Operating expenses |  |
Operating Expenses, Excluding Fuel | (118) | (111)
Economic fuel | 0 | 0
Total Operating Expenses | (118) | (111)
Nonoperating Income (Expense) |  |
Interest income | (7) | (3)
Interest expense | 7 | 3
Interest Costs Capitalized | 0 | 0
Other | 0 | 0
Nonoperating Income (Expense) Total | 0 | 0
Income (loss) before income tax | 2 | 1
Special Revenue and Charges [Member] |  |
Operating Revenues |  |
Total Operating Revenues | 0 | 0
Operating expenses |  |
Operating Expenses, Excluding Fuel | 26 | 31
Economic fuel | (4) | (13)
Total Operating Expenses | 22 | 18
Nonoperating Income (Expense) |  |
Interest income | 0 | 0
Interest expense | 0 | 0
Interest Costs Capitalized | 0 | 0
Other | 0 | 0
Nonoperating Income (Expense) Total | 0 | 0
Income (loss) before income tax | (22) | (18)
Passenger [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 1,716 | 1,684
Passenger [Member] | Air Group Adjusted [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 1,716 | 1,684
Passenger [Member] | Alaska Mainline [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 1,422 | 1,441
Passenger [Member] | Alaska Regional [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 294 | 243
Passenger [Member] | Horizon [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Passenger [Member] | Intersegment Elimination [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Passenger [Member] | Special Revenue and Charges [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Capacity Purchase Agreements [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Capacity Purchase Agreements [Member] | Air Group Adjusted [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Capacity Purchase Agreements [Member] | Alaska Mainline [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Capacity Purchase Agreements [Member] | Alaska Regional [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Capacity Purchase Agreements [Member] | Horizon [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 116 | 110
Capacity Purchase Agreements [Member] | Intersegment Elimination [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | (116) | (110)
Capacity Purchase Agreements [Member] | Special Revenue and Charges [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Mileage plan other revenue [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 110 | 107
Mileage plan other revenue [Member] | Air Group Adjusted [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 110 | 107
Mileage plan other revenue [Member] | Alaska Mainline [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 100 | 98
Mileage plan other revenue [Member] | Alaska Regional [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 10 | 9
Mileage plan other revenue [Member] | Horizon [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Mileage plan other revenue [Member] | Intersegment Elimination [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Mileage plan other revenue [Member] | Special Revenue and Charges [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Cargo and Freight [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 50 | 41
Cargo and Freight [Member] | Air Group Adjusted [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 50 | 41
Cargo and Freight [Member] | Alaska Mainline [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 48 | 40
Cargo and Freight [Member] | Alaska Regional [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 1 | 0
Cargo and Freight [Member] | Horizon [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 1 | 1
Cargo and Freight [Member] | Intersegment Elimination [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | 0 | 0
Cargo and Freight [Member] | Special Revenue and Charges [Member] |  |
Operating Revenues |  |
Revenue from contract with customer, including assessed taxes | $ 0 | $ 0

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