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. 26, 2022	Feb. 27, 2021	Feb. 29, 2020
Change in fair value of plan assets:
Employer contributions	$ 29.8	$ 60.0	$ 11.0
Pension
Change in projected benefit obligation:
Beginning balance	2,370.5	2,516.2
Service cost	21.8	15.7	14.7
Interest cost	39.9	48.6	80.6
Actuarial (gain) loss	(52.4)	11.9
Plan participant contributions	0.0	0.0
Benefit payments (including settlements)	(379.3)	(221.9)
Plan amendments	0.7	0.0
Ending balance	2,001.2	2,370.5	2,516.2
Change in fair value of plan assets:
Beginning balance	1,941.6	1,743.7
Actual return on plan assets	72.1	361.2
Employer contributions	27.9	58.6
Plan participant contributions	0.0	0.0
Benefit payments (including settlements)	(379.3)	(221.9)
Ending balance	1,662.3	1,941.6	1,743.7
Components of net amount recognized in financial position:
Other current liabilities	(6.2)	(6.3)
Other long-term liabilities	(332.7)	(422.6)
Funded status	(338.9)	(428.9)
Other Post-Retirement Benefits
Change in projected benefit obligation:
Beginning balance	21.2	20.9
Service cost	0.0	0.0	0.6
Interest cost	0.2	0.4	0.7
Actuarial (gain) loss	(0.4)	1.3
Plan participant contributions	0.0	0.2
Benefit payments (including settlements)	(2.0)	(1.6)
Plan amendments	0.0	0.0
Ending balance	19.0	21.2	20.9
Change in fair value of plan assets:
Beginning balance	0.0	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	2.0	1.4
Plan participant contributions	0.0	0.2
Benefit payments (including settlements)	(2.0)	(1.6)
Ending balance	0.0	0.0	$ 0.0
Components of net amount recognized in financial position:
Other current liabilities	(2.7)	(2.8)
Other long-term liabilities	(16.3)	(18.4)
Funded status	$ (19.0)	$ (21.2)