OTHER COMPREHENSIVE INCOME OR LOSS (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 25, 2023	Feb. 26, 2022	Feb. 27, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 3,024.6	$ 1,324.3	$ 2,278.1
Other comprehensive income (loss) before reclassifications	0.2	22.1
Amounts reclassified from Accumulated other comprehensive income	(0.5)	(15.5)
Tax benefit (expense)	0.6	(1.1)
Other comprehensive income	0.3	5.5	182.0
Ending balance	1,610.7	3,024.6	1,324.3
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	69.0	63.5	(118.5)
Ending balance	69.3	69.0	63.5
Pension and Post-retirement benefit plan items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	67.1	61.3
Other comprehensive income (loss) before reclassifications	6.0	22.9
Amounts reclassified from Accumulated other comprehensive income	(0.5)	(15.5)
Tax benefit (expense)	(0.9)	(1.6)
Other comprehensive income	4.6	5.8
Ending balance	71.7	67.1	61.3
Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1.9	2.2
Other comprehensive income (loss) before reclassifications	(5.8)	(0.8)
Amounts reclassified from Accumulated other comprehensive income	0.0	0.0
Tax benefit (expense)	1.5	0.5
Other comprehensive income	(4.3)	(0.3)
Ending balance	$ (2.4)	$ 1.9	$ 2.2