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SHAREHOLDERS' EQUITY (Tables)
3 Months Ended
Mar. 31, 2021
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
Components of accumulated other comprehensive loss, net of tax (in millions):
March 31, 2021December 31, 2020
Related to marketable securities$11 $23 
Related to employee benefit plans(492)(498)
Related to interest rate derivatives(13)(19)
Total$(494)$(494)
Schedule of Stockholders' Equity Note, Warrants or Rights
Total warrants outstanding are as follows as of March 31, 2021:
Number of shares of ALK common stockStrike Price
PSP 1 928,127 $31.61 
CARES Act loan warrants427,080 31.61 
PSP 2 255,874 52.25 
Total1,611,081