PENSION AND POSTRETIREMENT BENEFITS (Tables)

3 Months Ended

Aug. 30, 2020

Compensation And Retirement Disclosure [Abstract]

Components of Pension Benefit and Other Postretirement Benefit Costs

Components of pension benefit and other postretirement benefit costs are:

	Pension Benefits
	Thirteen weeks ended
	August 30, 2020			August 25, 2019
Service cost	$	3.1		$	2.8
Interest cost		21.7			31.3
Expected return on plan assets		(35.0	)		(41.1	)
Amortization of prior service cost		0.6			0.7
Curtailment loss		—			0.6
Benefit cost (benefit) — Company plans		(9.6	)		(5.7	)
Pension benefit cost — multi-employer plans		1.8			1.5
Total benefit cost (benefit)	$	(7.8	)	$	(4.2	)

	Postretirement Benefits
	Thirteen weeks ended
	August 30, 2020			August 25, 2019
Service cost	$	0.1		$	—
Interest cost		0.3			0.7
Amortization of prior service benefit		(0.5	)		(0.5	)
Recognized net actuarial gain		(0.9	)		(1.2	)
Total cost (benefit)	$	(1.0	)	$	(1.0	)