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v3.20.1

Label | Element | Value
--- | --- | ---
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect | alk_TaxCutsandJobsActReclassificationfromAOCItoRetainedEarningsTaxEffect | $ 3,000,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 9,000,000
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture | us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 0
Stock Issued During Period, Value, Employee Stock Purchase Plan | us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan | 0
Dividends, Cash | us-gaap_DividendsCash | 45,000,000
AOCI Attributable to Parent [Member] |  |
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect | alk_TaxCutsandJobsActReclassificationfromAOCItoRetainedEarningsTaxEffect | 0
Retained Earnings [Member] |  |
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect | alk_TaxCutsandJobsActReclassificationfromAOCItoRetainedEarningsTaxEffect | $ 3,000,000

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