v3.26.1
EMPLOYEE BENEFIT PLANS AND COLLECTIVE BARGAINING AGREEMENTS - Narrative (Details)
employee in Thousands, $ in Millions
12 Months Ended
Oct. 13, 2025
Dec. 18, 2022
USD ($)
Feb. 28, 2026
USD ($)
employee
plan
Feb. 22, 2025
USD ($)
Feb. 24, 2024
USD ($)
Defined Benefit Plan Disclosure [Line Items]          
Group annuity policy purchased     $ 290.0    
Reduction to defined benefit pension obligations     295.0    
Settlement gain     $ 26.8    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]     Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax    
Employer contributions     $ 56.9 $ 91.3 $ 18.3
Expected employer contribution next fiscal year     $ 50.0    
Number of multiemployer plans | plan     28    
Employer discretionary contribution amount in 401(k)     $ 82.8 83.5 83.0
Number of company employees | employee     280    
Number of participants in collective bargaining agreements | employee     190    
Number of participants renegotiated | employee     126    
Number of employee scheduled to expire in collective bargaining agreements | employee     22    
Accrued retention bonus     $ 15.5 33.6 35.0
Merger Agreement          
Defined Benefit Plan Disclosure [Line Items]          
Aggregate retention program amount   $ 100.0      
Merger Agreement | Last day on year granted          
Defined Benefit Plan Disclosure [Line Items]          
Business combination termination, award vesting rights, percentage   50.00%      
Merger Agreement | Next twelve months          
Defined Benefit Plan Disclosure [Line Items]          
Business combination termination, award vesting rights, percentage 50.00%        
Pension          
Defined Benefit Plan Disclosure [Line Items]          
Settlement gain     29.4 (3.5) (0.3)
Fair value of plan assets     1,241.2 1,483.2 1,443.7
Employer contributions     55.6 89.8  
Pension obligation     1,329.9 1,641.4 1,691.5
Contributions by company     583.3 547.7 545.5
Pension | Safeway Plan          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     1,006.8    
Pension | Shaw's Plan          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     187.0    
Pension | Safeway VAPP          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     41.7    
Other Pension Plan          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets     5.7    
Other Post-Retirement Benefits          
Defined Benefit Plan Disclosure [Line Items]          
Settlement gain     0.0 0.0 0.0
Fair value of plan assets     0.0 0.0 0.0
Employer contributions     1.3 1.5  
Pension obligation     10.1 12.1 12.0
Multiemployer Health and Welfare Plans          
Defined Benefit Plan Disclosure [Line Items]          
Contributions by company     $ 1,300.0 $ 1,300.0 $ 1,300.0