OTHER COMPREHENSIVE INCOME OR LOSS (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 22, 2025	Feb. 24, 2024	Feb. 25, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,747.5	$ 1,610.7	$ 3,024.6
Other comprehensive income before reclassifications	9.8	31.2
Amounts reclassified from Accumulated other comprehensive income	(0.8)	(5.9)
Tax expense	(2.3)	(6.6)
Other comprehensive income	6.7	18.7	0.3
Ending balance	3,385.9	2,747.5	1,610.7
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	88.0	69.3	69.0
Ending balance	94.7	88.0	69.3
Pension and Post-retirement benefit plan items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	87.5	71.7
Other comprehensive income before reclassifications	7.4	27.3
Amounts reclassified from Accumulated other comprehensive income	(0.8)	(5.9)
Tax expense	(1.7)	(5.6)
Other comprehensive income	4.9	15.8
Ending balance	92.4	87.5	71.7
Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0.5	(2.4)
Other comprehensive income before reclassifications	2.4	3.9
Amounts reclassified from Accumulated other comprehensive income	0.0	0.0
Tax expense	(0.6)	(1.0)
Other comprehensive income	1.8	2.9
Ending balance	$ 2.3	$ 0.5	$ (2.4)