EMPLOYEE BENEFIT PLANS AND COLLECTIVE BARGAINING AGREEMENTS - Schedule of Changes in Retirement Plan's Benefit Obligation and Fair Value of Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 24, 2024	Feb. 25, 2023	Feb. 26, 2022
Change in fair value of plan assets:
Employer contributions	$ 18.3	$ 27.3	$ 29.8
Pension
Change in projected benefit obligation:
Beginning balance	1,697.5	2,001.2
Service cost	17.3	19.9	21.8
Interest cost	83.6	51.4	39.9
Actuarial loss (gain)	28.6	(230.8)
Benefit payments (including settlements)	(135.4)	(144.7)
Plan amendments	(0.1)	0.5
Ending balance	1,691.5	1,697.5	2,001.2
Change in fair value of plan assets:
Beginning balance	1,407.3	1,662.3
Actual return on plan assets	155.4	(136.1)
Employer contributions	16.4	25.8
Benefit payments (including settlements)	(135.4)	(144.7)
Ending balance	1,443.7	1,407.3	1,662.3
Components of net amount recognized in financial position:
Other current liabilities	(13.8)	(6.8)
Other long-term liabilities	(234.0)	(283.4)
Funded status	(247.8)	(290.2)
Other Post-Retirement Benefits
Change in projected benefit obligation:
Beginning balance	12.4	19.0
Service cost	0.0	0.0	0.0
Interest cost	0.6	0.4	0.2
Actuarial loss (gain)	0.9	(5.5)
Benefit payments (including settlements)	(1.9)	(1.5)
Plan amendments	0.0	0.0
Ending balance	12.0	12.4	19.0
Change in fair value of plan assets:
Beginning balance	0.0	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	1.9	1.5
Benefit payments (including settlements)	(1.9)	(1.5)
Ending balance	0.0	0.0	$ 0.0
Components of net amount recognized in financial position:
Other current liabilities	(2.0)	(2.0)
Other long-term liabilities	(10.0)	(10.4)
Funded status	$ (12.0)	$ (12.4)