PENSION AND POSTRETIREMENT BENEFITS (Tables)

3 Months Ended

Aug. 25, 2019

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 25, 2019			August 26, 2018
Service cost	$	2.8		$	2.7
Interest cost		31.3			32.0
Expected return on plan assets		(41.1	)		(42.3	)
Amortization of prior service cost		0.7			0.7
Curtailment loss		0.6			—
Benefit cost (benefit) — Company plans		(5.7	)		(6.9	)
Pension benefit cost — multi-employer plans		1.5			1.7
Total benefit cost (benefit)	$	(4.2	)	$	(5.2	)

	Postretirement Benefits
	Thirteen weeks ended
	August 25, 2019			August 26, 2018
Service cost	$	—		$	0.1
Interest cost		0.7			0.9
Amortization of prior service benefit		(0.5	)		(0.5	)
Recognized net actuarial gain		(1.2	)		(0.4	)
Curtailment gain		—			(0.6	)
Total cost (benefit)	$	(1.0	)	$	(0.5	)