EMPLOYEE BENEFIT PLANS - Schedule of Components of Net Pension and Post-retirement Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 12, 2020	Sep. 07, 2019	Sep. 12, 2020	Sep. 07, 2019
Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated return on plan assets	$ (23.7)	$ (25.3)	$ (55.2)	$ (59.2)
Service cost	3.5	3.4	8.3	7.9
Interest cost	12.6	18.6	29.2	43.4
Amortization of prior service cost	0.0	0.1	0.1	0.2
Amortization of net actuarial loss (gain)	0.5	0.1	1.1	0.3
Settlement charge	3.0	0.0	3.0	0.0
(Income) expense, net	(4.1)	(3.1)	(13.5)	(7.4)
Other post-retirement benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated return on plan assets	0.0	0.0	0.0	0.0
Service cost	0.0	0.1	0.0	0.3
Interest cost	0.1	0.2	0.2	0.4
Amortization of prior service cost	0.4	0.9	1.0	2.0
Amortization of net actuarial loss (gain)	(0.1)	(0.2)	(0.3)	(0.3)
Settlement charge	0.0	0.0	0.0	0.0
(Income) expense, net	$ 0.4	$ 1.0	$ 0.9	$ 2.4