RETIREMENT AND BENEFIT PLANS (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 30, 2017 USD ($)	Jul. 31, 2016 USD ($)	Jul. 30, 2017 USD ($)	Jul. 31, 2016 USD ($)	Apr. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Loss on settlement			$ 9.4	$ 0.0
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retiree Participants					4,000
Number of Noncontributory Defined Benefit Pension Plans	5		5
Service cost, including plan expenses	$ 6.4	$ 6.1	$ 13.3	12.6
Interest cost	6.5	7.4	12.9	14.9
Expected return on plan assets	(9.6)	(8.9)	(19.3)	(17.9)
Loss on settlement	0.0	0.0	9.4	0.0
Total	$ 3.3	4.6	$ 16.3	9.6
Vesting Period Non-Contributory Defined Benefit Pension Plans			5 years
Defined Benefit Plan, Accumulated Benefit Obligation Settled			$ 65.3
SERP Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of Noncontributory Defined Benefit Pension Plans	3		3
Plan Benefit Payment Activation Age	65		65
Plan Benefit Payment Period			10 years
Minimum Number of Years of Employment			10 years
Minimum Age Prior to Employment Termination	55		55
Service cost, including plan expenses	$ 1.1	0.9	$ 2.3	2.2
Interest cost	0.9	0.9	1.9	1.9
Total	$ 2.0	$ 1.8	$ 4.2	$ 4.1
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of Noncontributory Defined Benefit Pension Plans	2		2