$ALK
ALASKA AIR GROUP, INC. Stock $alk

$alk Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000076642122000009 Filed on February 11, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$1.899B	$6.176B	$808.0M
YoY Change	135.02%	73.19%	-63.73%
Cost Of Revenue	$876.0M	$2.952B	$495.0M
YoY Change	76.97%	37.94%	-48.92%
Gross Profit	$1.023B	$3.224B	$313.0M
YoY Change	226.84%	126.09%	-75.14%
Gross Profit Margin	53.87%	52.2%	38.74%
Selling, General & Admin	$729.0M	$2.563B	$557.0M
YoY Change	30.88%	11.29%	-26.03%
% of Gross Profit	71.26%	79.5%	177.96%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$100.0M	$394.0M	$100.0M
YoY Change	0.0%	-6.19%	-5.66%
% of Gross Profit	9.78%	12.22%	31.95%
Operating Expenses	$988.0M	$5.491B	$754.0M
YoY Change	31.03%	2.81%	-25.12%
Operating Profit	$35.00M	$685.0M	-$441.0M
YoY Change	-107.94%	-138.59%	-275.0%
Interest Expense	-$19.00M	$128.0M	-$23.00M
YoY Change	-17.39%	30.61%	-1250.0%
% of Operating Profit	-54.29%	18.69%
Other Income/Expense, Net	$9.000M	-$56.00M	$1.000M
YoY Change	800.0%	-13.85%	-116.67%
Pretax Income	$29.00M	$629.0M	-$643.0M
YoY Change	-104.51%	-134.18%	-364.61%
Income Tax	$25.00M	$151.0M	-$196.0M
% Of Pretax Income	86.21%	24.01%
Net Earnings	$18.00M	$478.0M	-$447.0M
YoY Change	-104.03%	-136.1%	-346.96%
Net Earnings / Revenue	0.95%	7.74%	-55.32%
Basic Earnings Per Share		$3.82
Diluted Earnings Per Share	$140.5K	$3.77	-$3.605M
COMMON SHARES
Basic Shares Outstanding	125.3M shares	125.1M shares	123.7M shares
Diluted Shares Outstanding		126.8M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$3.070B	$3.116B	$3.346B
YoY Change	-8.25%	-6.87%	119.99%
Cash & Equivalents	$470.0M	$470.0M	$1.370B
Short-Term Investments	$2.600B	$2.646B	$1.976B
Other Short-Term Assets	$196.0M	$196.0M	$123.0M
YoY Change	59.35%	59.35%	1.65%
Inventory	$62.00M	$62.00M	$57.00M
Prepaid Expenses
Receivables	$546.0M	$546.0M	$480.0M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$3.920B	$3.920B	$4.006B
YoY Change	-2.15%	-2.15%	96.66%
LONG-TERM ASSETS
Property, Plant & Equipment	$6.138B	$7.591B	$6.211B
YoY Change	-1.18%	-0.26%	-10.01%
Goodwill	$2.044B		$2.050B
YoY Change	-0.29%		5.51%
Intangibles			$107.0M
YoY Change			-12.3%
Long-Term Investments
YoY Change
Other Assets	$396.0M	$396.0M	$379.0M
YoY Change	4.49%	4.49%	36.33%
Total Long-Term Assets	$10.03B	$10.03B	$10.04B
YoY Change	-0.09%	-0.09%	-8.36%
TOTAL ASSETS
Total Short-Term Assets	$3.920B	$3.920B	$4.006B
Total Long-Term Assets	$10.03B	$10.03B	$10.04B
Total Assets	$13.95B	$13.95B	$14.05B
YoY Change	-0.68%	-0.68%	8.1%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$200.0M	$200.0M	$108.0M
YoY Change	85.19%	85.19%	-26.03%
Accrued Expenses	$625.0M	$1.350B	$424.0M
YoY Change	47.41%	8.78%	-1.62%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$366.0M	$366.0M	$1.138B
YoY Change	-67.84%	-67.84%	384.26%
Total Short-Term Liabilities	$3.991B	$3.991B	$4.293B
YoY Change	-7.03%	-7.03%	34.11%
LONG-TERM LIABILITIES
Long-Term Debt	$2.173B	$2.173B	$2.357B
YoY Change	-7.81%	-7.81%	86.47%
Other Long-Term Liabilities	$378.0M	$3.408B	$524.0M
YoY Change	-27.86%	-14.82%	125.86%
Total Long-Term Liabilities	$2.551B	$5.581B	$2.881B
YoY Change	-11.45%	-12.22%	-31.36%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.991B	$3.991B	$4.293B
Total Long-Term Liabilities	$2.551B	$5.581B	$2.881B
Total Liabilities	$6.542B	$10.15B	$7.174B
YoY Change	-8.81%	-8.21%	-3.03%
SHAREHOLDERS EQUITY
Retained Earnings	$4.242B		$3.764B
YoY Change	12.7%		-26.67%
Common Stock	$495.0M		$392.0M
YoY Change	26.28%		28.1%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$674.0M		$674.0M
YoY Change	0.0%		4.82%
Treasury Stock Shares	9.350M shares		9.350M shares
Shareholders Equity	$3.801B	$3.801B	$2.988B
YoY Change
Total Liabilities & Shareholders Equity	$13.95B	$13.95B	$14.05B
YoY Change	-0.68%	-0.68%	8.1%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$18.00M	$478.0M	-$447.0M
YoY Change	-104.03%	-136.1%	-346.96%
Depreciation, Depletion And Amortization	$100.0M	$394.0M	$100.0M
YoY Change	0.0%	-6.19%	-5.66%
Cash From Operating Activities	$129.0M	$1.030B	-$350.0M
YoY Change	-136.86%	-540.17%	-202.64%
INVESTING ACTIVITIES
Capital Expenditures	-$105.0M	$292.0M	-$24.00M
YoY Change	337.5%	31.53%	-85.8%
Acquisitions
YoY Change
Other Investing Activities	$40.00M	$12.00M	$198.0M
YoY Change	-79.8%	100.0%	130.23%
Cash From Investing Activities	-$65.00M	-$1.008B	$174.0M
YoY Change	-137.36%	69.98%	-309.64%
FINANCING ACTIVITIES
Cash Dividend Paid		$0.00
YoY Change		-100.0%
Common Stock Issuance & Retirement, Net		$0.00
YoY Change		-100.0%
Debt Paid & Issued, Net		$1.300B
YoY Change		130.09%
Cash From Financing Activities	-89.00M	-$914.0M	-305.0M
YoY Change	-70.82%	-146.14%	10.91%
NET CHANGE
Cash From Operating Activities	129.0M	$1.030B	-350.0M
Cash From Investing Activities	-65.00M	-$1.008B	174.0M
Cash From Financing Activities	-89.00M	-$914.0M	-305.0M
Net Change In Cash	-25.00M	-$892.0M	-481.0M
YoY Change	-94.8%	-177.3%	2729.41%
FREE CASH FLOW
Cash From Operating Activities	$129.0M	$1.030B	-$350.0M
Capital Expenditures	-$105.0M	$292.0M	-$24.00M
Free Cash Flow	$234.0M	$738.0M	-$326.0M
YoY Change	-171.78%	-261.84%	-163.92%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000766421
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
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CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	19300 International Boulevard
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CY2021Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
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CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2021	alk	Percentof Mileage Breakage PercentofMileageBreakage	0.174
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CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	1-8957
CY2021	dei	Entity Registrant Name EntityRegistrantName	ALASKA AIR GROUP, INC.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	91-1292054
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Seattle
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98188
CY2021	dei	City Area Code CityAreaCode	206
CY2021	dei	Local Phone Number LocalPhoneNumber	392-5040
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.01 Par Value
CY2021	dei	Trading Symbol TradingSymbol	ALK
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	6000000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	44000000	USD
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CY2020	us-gaap	Operating Expenses OperatingExpenses	5341000000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	7718000000	USD
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	685000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	-1775000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	1063000000	USD
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	25000000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	31000000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	42000000	USD
CY2021	us-gaap	Interest Expense InterestExpense	128000000	USD
CY2020	us-gaap	Interest Expense InterestExpense	98000000	USD
CY2019	us-gaap	Interest Expense InterestExpense	78000000	USD
CY2021	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	11000000	USD
CY2020	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	11000000	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	15000000	USD
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CY2020	alk	Special Items Net Non Operating SpecialItemsNetNonOperating	-26000000	USD
CY2019	alk	Special Items Net Non Operating SpecialItemsNetNonOperating	0	USD
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	36000000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	17000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-26000000	USD
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-56000000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-65000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-47000000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	629000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1840000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1016000000	USD
CY2021	alk	Income Tax Expense Benefit Before Tax Cutsand Jobs Actof2017 IncomeTaxExpenseBenefitBeforeTaxCutsandJobsActof2017	151000000	USD
CY2020	alk	Income Tax Expense Benefit Before Tax Cutsand Jobs Actof2017 IncomeTaxExpenseBenefitBeforeTaxCutsandJobsActof2017	-516000000	USD
CY2019	alk	Income Tax Expense Benefit Before Tax Cutsand Jobs Actof2017 IncomeTaxExpenseBenefitBeforeTaxCutsandJobsActof2017	247000000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	478000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-1324000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	769000000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.82
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-10.72
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.24
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.77
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-10.72
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.19
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	125063000.000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	123450000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	123279000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	126775000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	123450000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	124289000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	478000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-1324000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	769000000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-30000000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	31000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	6000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	14000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	5000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-9000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	5000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	6000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-27000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	14000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	20000000	USD
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	294000000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-69000000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-71000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	33000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	30000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	32000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-14000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-8000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	232000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-81000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	10000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	10000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-246000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	29000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	29000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	17000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-21000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-13000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-3000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-3000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	4000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-4000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-2000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	13000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-29000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-17000000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	710000000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1353000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	752000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	3751000000	USD
CY2019	alk	Impact Of Adoption Of Asc842 ImpactOfAdoptionOfASC842	3000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	769000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-17000000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	75000000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	36000000	USD
CY2019	us-gaap	Dividends Cash DividendsCash	173000000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	40000000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-3000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	4331000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-1324000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-29000000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	31000000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	34000000	USD
CY2020	us-gaap	Dividends Cash DividendsCash	45000000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	41000000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-3000000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	2988000000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	478000000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	232000000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	44000000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	16000000	USD
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	48000000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-5000000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	3801000000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	478000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-1324000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	769000000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	394000000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	420000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	423000000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	51000000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	24000000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	29000000	USD
CY2021	alk	Special Items Impairment Charges And Other SpecialItemsImpairmentChargesAndOther	-1000000	USD
CY2020	alk	Special Items Impairment Charges And Other SpecialItemsImpairmentChargesAndOther	627000000	USD
CY2019	alk	Special Items Impairment Charges And Other SpecialItemsImpairmentChargesAndOther	0	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	-10000000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	220000000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-104000000	USD
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	300000000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-209000000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	66000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	160000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-43000000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	90000000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	173000000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	112000000	USD
CY2021	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	81000000	USD
CY2020	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	288000000	USD
CY2019	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	116000000	USD
CY2021	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	-100000000	USD
CY2020	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	0	USD
CY2019	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	-65000000	USD
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	9000000	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-202000000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	86000000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1030000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-234000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1722000000	USD
CY2021	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	68000000	USD
CY2020	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	64000000	USD
CY2019	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	356000000	USD
CY2021	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	126000000	USD
CY2020	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	55000000	USD
CY2019	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	178000000	USD
CY2021	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	98000000	USD
CY2020	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	103000000	USD
CY2019	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	162000000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	292000000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	222000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	696000000	USD
CY2021	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	4301000000	USD
CY2020	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	2962000000	USD
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	1810000000	USD
CY2021	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	3595000000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	2318000000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	1674000000	USD
CY2021	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	2000000	USD
CY2020	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	279000000	USD
CY2019	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	28000000	USD
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	12000000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	6000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-13000000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1008000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-593000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-791000000	USD
CY2021	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	363000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	2564000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	450000000	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1334000000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	565000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1058000000	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	31000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	75000000	USD
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	0	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	45000000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	173000000	USD
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	57000000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	58000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	43000000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-914000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1981000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-813000000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-892000000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	1154000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	118000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1386000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	232000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	114000000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	494000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1386000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	232000000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	109000000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	50000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	60000000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	48000000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	31000000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	470000000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1370000000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1370000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	221000000	USD
CY2021Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	24000000	USD
CY2020Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	16000000	USD
CY2019Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	11000000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	494000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1386000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	232000000	USD
CY2021Q4	us-gaap	Bank Overdrafts BankOverdrafts	7000000	USD
CY2020Q4	us-gaap	Bank Overdrafts BankOverdrafts	5000000	USD
CY2021Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	49000000	USD
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	46000000	USD
CY2021Q4	us-gaap	Energy Related Inventory EnergyRelatedInventory	21000000	USD
CY2020Q4	us-gaap	Energy Related Inventory EnergyRelatedInventory	15000000	USD
CY2021Q4	alk	Lease Return Provision Current LeaseReturnProvisionCurrent	-53000000	USD
CY2021Q4	alk	Lease Return Provision Non Current LeaseReturnProvisionNonCurrent	-114000000	USD
CY2021Q4	alk	Aircraft Maintenance Deposits AircraftMaintenanceDeposits	175000000	USD
CY2020Q4	alk	Aircraft Maintenance Deposits AircraftMaintenanceDeposits	242000000	USD
CY2020Q4	alk	Lease Return Provision Current LeaseReturnProvisionCurrent	54000000	USD
CY2020Q4	alk	Lease Return Provision Non Current LeaseReturnProvisionNonCurrent	246000000	USD
CY2021	us-gaap	Advertising Expense AdvertisingExpense	63000000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	41000000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	72000000	USD
CY2021	alk	Leased Aircraft Return Costs LeasedAircraftReturnCosts	209000000	USD
CY2021	alk	Special Items Impairment Charges And Other SpecialItemsImpairmentChargesAndOther	-1000000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	220000000	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	-10000000	USD
CY2020Q4	us-gaap	Restructuring And Related Cost Expected Cost Remaining1 RestructuringAndRelatedCostExpectedCostRemaining1	127000000	USD
CY2020	alk	Cares Act Payroll Tax Relief CARESActPayrollTaxRelief	29000000	USD
CY2020	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	14000000	USD
CY2021	us-gaap	Payments For Restructuring PaymentsForRestructuring	105000000	USD
CY2021	us-gaap	Restructuring Charges RestructuringCharges	-10000000	USD
CY2021Q4	us-gaap	Restructuring And Related Cost Expected Cost Remaining1 RestructuringAndRelatedCostExpectedCostRemaining1	12000000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	363000000	USD
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	30000000	USD
CY2020	alk	Special Items Impairment Charges And Other SpecialItemsImpairmentChargesAndOther	627000000	USD
CY2021Q4	alk	Psp Installments Received PSPInstallmentsReceived	1100000000	USD
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CY2021	alk	Proceeds From Payroll Support Program Grant ProceedsFromPayrollSupportProgramGrant	892000000	USD
CY2020	alk	Proceeds From Payroll Support Program Grant ProceedsFromPayrollSupportProgramGrant	753000000	USD
CY2021	alk	Cares Act Payroll Tax Relief CARESActPayrollTaxRelief	21000000	USD
CY2021Q4	us-gaap	Credit Card Receivables CreditCardReceivables	167000000	USD
CY2020Q4	us-gaap	Credit Card Receivables CreditCardReceivables	83000000	USD
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CY2021	alk	Percentof Mileage Breakage PercentofMileageBreakage	0.174
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	90000000	USD
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	43000000	USD
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	208000000	USD
CY2021	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	-38000000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	44000000	USD
CY2019	us-gaap	Payments For Proceeds From Hedge Investing Activities PaymentsForProceedsFromHedgeInvestingActivities	19000000	USD
CY2021Q4	us-gaap	Marketable Securities MarketableSecurities	2600000000	USD
CY2021	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	3600000000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	2300000000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	1700000000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	1064000000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	1065000000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	1537000000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	1532000000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	42000000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	2645000000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	2639000000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	6000000	USD
CY2021Q4	alk	Unsecured Term Loan Through Psp Of Cares Act UnsecuredTermLoanThroughPSPOfCARESAct	600000000	USD
CY2020Q4	alk	Unsecured Term Loan Through Psp Of Cares Act UnsecuredTermLoanThroughPSPOfCARESAct	290000000	USD
CY2021Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	20000000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	33000000	USD
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	2539000000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	3495000000	USD
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	366000000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1138000000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2173000000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2357000000	USD
CY2021Q4	us-gaap	Long Term Debt Percentage Bearing Fixed Interest Rate LongTermDebtPercentageBearingFixedInterestRate	0.037
CY2020Q4	us-gaap	Long Term Debt Percentage Bearing Fixed Interest Rate LongTermDebtPercentageBearingFixedInterestRate	0.043
CY2021Q4	us-gaap	Long Term Debt Percentage Bearing Variable Interest Rate LongTermDebtPercentageBearingVariableInterestRate	0.013
CY2020Q4	us-gaap	Long Term Debt Percentage Bearing Variable Interest Rate LongTermDebtPercentageBearingVariableInterestRate	0.019
CY2021Q4	us-gaap	Longterm Debt Weighted Average Interest Rate LongtermDebtWeightedAverageInterestRate	0.033
CY2021	us-gaap	Debt Instrument Increase Decrease For Period Net DebtInstrumentIncreaseDecreaseForPeriodNet	-956000000	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1300000000	USD
CY2021	us-gaap	Repayments Of Debt RepaymentsOfDebt	923000000	USD
CY2021	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	363000000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	371000000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	334000000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	240000000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	261000000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	176000000	USD
CY2021Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1177000000	USD
CY2021Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2559000000	USD
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CY2021Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	486000000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1453000000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1400000000	USD
CY2021	us-gaap	Sublease Income SubleaseIncome	16000000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	14000000	USD
CY2019	us-gaap	Sublease Income SubleaseIncome	13000000	USD
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	654000000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	602000000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	668000000	USD
CY2021	us-gaap	Sublease Income SubleaseIncome	16000000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	14000000	USD
CY2019	us-gaap	Sublease Income SubleaseIncome	13000000	USD
CY2021	us-gaap	Lease Cost LeaseCost	638000000	USD
CY2020	us-gaap	Lease Cost LeaseCost	588000000	USD
CY2019	us-gaap	Lease Cost LeaseCost	655000000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	359000000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	273000000	USD
CY2021Q4	us-gaap	Lessor Operating Lease Lease Not Yet Commenced Assumption And Judgment Value Of Underlying Asset Amount LessorOperatingLeaseLeaseNotYetCommencedAssumptionAndJudgmentValueOfUnderlyingAssetAmount	730000000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1145000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1126000000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	19000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	15000000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other Finite Lived Assets DeferredTaxLiabilitiesOtherFiniteLivedAssets	351000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other Finite Lived Assets DeferredTaxLiabilitiesOtherFiniteLivedAssets	342000000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	76000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	106000000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1591000000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1589000000	USD
CY2021Q4	alk	Deferred Tax Assets Mileage Plan DeferredTaxAssetsMileagePlan	416000000	USD
CY2020Q4	alk	Deferred Tax Assets Mileage Plan DeferredTaxAssetsMileagePlan	385000000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	17000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	17000000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	127000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	215000000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	25000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	27000000	USD
CY2021Q4	alk	Deferred Tax Assets Leasing Arrangement DeferredTaxAssetsLeasingArrangement	374000000	USD
CY2020Q4	alk	Deferred Tax Assets Leasing Arrangement DeferredTaxAssetsLeasingArrangement	381000000	USD
CY2021Q4	alk	Deferred Tax Assets Leasehold Maintenance DeferredTaxAssetsLeaseholdMaintenance	-40000000	USD
CY2020Q4	alk	Deferred Tax Assets Leasehold Maintenance DeferredTaxAssetsLeaseholdMaintenance	-73000000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	34000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	103000000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1033000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1201000000	USD
CY2021Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	20000000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	19000000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	578000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	407000000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	52000000	USD
CY2021Q4	us-gaap	Taxes Payable Current And Noncurrent TaxesPayableCurrentAndNoncurrent	21000000	USD
CY2021Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	20000000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	40000000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-212000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	26000000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	16000000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-11000000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	13000000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	56000000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-223000000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	39000000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	80000000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-246000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	175000000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	15000000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-47000000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	33000000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	95000000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-293000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	208000000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	151000000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-516000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	247000000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	629000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1840000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1016000000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	132000000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-386000000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	213000000	USD
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	10000000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	9000000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	9000000	USD
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	20000000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-62000000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	36000000	USD
CY2021	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-14000000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-93000000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-9000000	USD
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1000000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	18000000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	2000000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-2000000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-2000000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	151000000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-516000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	247000000	USD
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.240
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CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.243
CY2021	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-14000000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-93000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	35000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	40000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	40000000	USD
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CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1000000	USD
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CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3000000	USD
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CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	41000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	35000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	40000000	USD
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CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	34000000	USD
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CY2021	alk	Numberof Defined Contribution Plans NumberofDefinedContributionPlans	7	plan
CY2021	alk	Numberof Qualified Defined Benefit Plans NumberofQualifiedDefinedBenefitPlans	4	plan
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation	1750000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation	2207000000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	1685000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	2057000000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	1595000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	1710000000	USD
CY2021	us-gaap	Defined Benefit Plan Special Termination Benefits DefinedBenefitPlanSpecialTerminationBenefits	0	USD
CY2020	us-gaap	Defined Benefit Plan Special Termination Benefits DefinedBenefitPlanSpecialTerminationBenefits	11000000	USD
CY2019	us-gaap	Defined Benefit Plan Special Termination Benefits DefinedBenefitPlanSpecialTerminationBenefits	0	USD
CY2021	alk	Numberof Defined Contribution Plans NumberofDefinedContributionPlans	7	plan
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	125000000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	126000000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	132000000	USD
CY2021	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	151000000	USD
CY2020	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	130000000	USD
CY2019	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	163000000	USD
CY2021	alk	Quarterly Payout To Employee Under Employee Incentive Plan Maximum QuarterlyPayoutToEmployeeUnderEmployeeIncentivePlanMaximum	450	USD
CY2021	alk	Quarterly Payout To Employee Under Employee Incentive Plan Maximum QuarterlyPayoutToEmployeeUnderEmployeeIncentivePlanMaximum	450	USD
CY2021Q4	alk	Lax Redevelopment Project Total Expected Outlay LAXRedevelopmentProjectTotalExpectedOutlay	230000000	USD
	us-gaap	Payments For Construction In Process PaymentsForConstructionInProcess	71000000	USD
	alk	Lax Construction Amount Reimbursed LAXConstructionAmountReimbursed	8700000	USD
CY2021Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	22000000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	45000000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	173000000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	31000000	USD
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	538078	shares
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	75000000	USD
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	1192820	shares
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	9349944	shares
CY2021Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights	539508	shares
CY2021Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	1882518	shares
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-4000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	23000000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	252000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	498000000	USD
CY2021Q4	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-6000000	USD
CY2020Q4	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-19000000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-262000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-494000000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	44000000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	34000000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	36000000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	11000000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	8000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	9000000	USD
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	24000000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y3M18D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	20000000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	6990817	shares
CY2021	us-gaap	Revenues Revenues	6176000000	USD
CY2021	alk	Operating Expenses Excluding Fuel OperatingExpensesExcludingFuel	4212000000	USD
CY2021	us-gaap	Fuel Costs FuelCosts	1279000000	USD
CY2021	us-gaap	Operating Expenses OperatingExpenses	5491000000	USD
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-56000000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	629000000	USD
CY2020	us-gaap	Revenues Revenues	3566000000	USD
CY2020	alk	Operating Expenses Excluding Fuel OperatingExpensesExcludingFuel	4618000000	USD
CY2020	us-gaap	Fuel Costs FuelCosts	723000000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	5341000000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-65000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1840000000	USD
CY2019	us-gaap	Revenues Revenues	8781000000	USD
CY2019	alk	Operating Expenses Excluding Fuel OperatingExpensesExcludingFuel	5840000000	USD
CY2019	us-gaap	Fuel Costs FuelCosts	1878000000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	7718000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-47000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1016000000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	394000000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	420000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	423000000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	292000000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	222000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	696000000	USD
CY2021Q4	us-gaap	Assets Assets	13951000000	USD
CY2020Q4	us-gaap	Assets Assets	14046000000	USD
CY2021	dei	Auditor Name AuditorName	KPMG LLP
CY2021	dei	Auditor Location AuditorLocation	Seattle, WA
CY2021	dei	Auditor Firm AuditorFirmId	185

Files In Submission

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$ALK
ALASKA AIR GROUP, INC. Stock $alk

2021 Q4 Form 10-K Financial Statement

#000076642122000009 Filed on February 11, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ALK ALASKA AIR GROUP, INC. Stock $alk

2021 Q4 Form 10-K Financial Statement

#000076642122000009 Filed on February 11, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ALK
ALASKA AIR GROUP, INC. Stock $alk