OTHER COMPREHENSIVE INCOME OR LOSS - Changes in the AOCI Balance (Details) - USD ($) $ in Millions	4 Months Ended
	Jun. 19, 2021	Jun. 20, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,324.3	$ 2,278.1
Other comprehensive income before reclassifications		1.2
Amounts reclassified from accumulated other comprehensive income	0.2	1.1
Tax expense	(0.1)	(0.6)
Other comprehensive income	0.1	1.7
Ending balance	1,698.4	1,194.9
Accumulated other comprehensive income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	63.5	(118.5)
Ending balance	63.6	(116.8)
Pension and Post-retirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	61.3	(121.7)
Other comprehensive income before reclassifications		0.0
Amounts reclassified from accumulated other comprehensive income	0.2	1.1
Tax expense	(0.1)	(0.3)
Other comprehensive income	0.1	0.8
Ending balance	61.4	(120.9)
Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	2.2	3.2
Other comprehensive income before reclassifications		1.2
Amounts reclassified from accumulated other comprehensive income	0.0	0.0
Tax expense	0.0	(0.3)
Other comprehensive income	0.0	0.9
Ending balance	$ 2.2	$ 4.1