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EMPLOYEE BENEFIT PLANS AND COLLECTIVE BARGAINING AGREEMENTS - Schedule of Components of Net Pension and Post-retirement Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Feb. 28, 2026
Feb. 22, 2025
Feb. 24, 2024
Components of net (income) expense:      
(Income) loss due to settlement accounting $ (26.8)    
Pension      
Components of net (income) expense:      
Estimated return on plan assets (83.1) $ (91.1) $ (98.5)
Service cost 15.9 16.7 17.3
Interest cost 70.8 83.4 83.6
Amortization of prior service cost 0.4 0.3 0.4
Amortization of net actuarial (gain) loss (2.7) (3.9) (5.5)
(Income) loss due to settlement accounting (29.4) 3.5 0.3
(Income) expense, net (28.1) 8.9 (2.4)
Changes in plan assets and benefit obligations recognized in Other comprehensive income (loss):      
Net actuarial (gain) loss (17.4) (8.6) (28.0)
Amortization of net actuarial gain (loss) 2.7 3.9 5.5
Prior service cost 0.0 0.1 (0.2)
Amortization of prior service cost (0.4) (0.3) (0.4)
Income (loss) due to settlement accounting 29.4 (3.5) (0.3)
Total recognized in Other comprehensive income (loss) 14.3 (8.4) (23.4)
Total net expense and changes in plan assets and benefit obligations recognized in Other comprehensive income (loss) (13.8) 0.5 (25.8)
Other Post-Retirement Benefits      
Components of net (income) expense:      
Estimated return on plan assets 0.0 0.0 0.0
Service cost 0.0 0.0 0.0
Interest cost 0.5 0.5 0.6
Amortization of prior service cost 0.0 0.0 0.0
Amortization of net actuarial (gain) loss (0.8) (0.7) (1.1)
(Income) loss due to settlement accounting 0.0 0.0 0.0
(Income) expense, net (0.3) (0.2) (0.5)
Changes in plan assets and benefit obligations recognized in Other comprehensive income (loss):      
Net actuarial (gain) loss (1.2) 1.1 0.8
Amortization of net actuarial gain (loss) 0.8 0.7 1.1
Prior service cost 0.0 0.0 0.0
Amortization of prior service cost 0.0 0.0 0.0
Income (loss) due to settlement accounting 0.0 0.0 0.0
Total recognized in Other comprehensive income (loss) (0.4) 1.8 1.9
Total net expense and changes in plan assets and benefit obligations recognized in Other comprehensive income (loss) $ (0.7) $ 1.6 $ 1.4