PENSION AND POSTRETIREMENT BENEFITS (Tables)

3 Months Ended

Aug. 26, 2018

Retirement Benefits [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 26, 2018			August 27, 2017
Service cost	$	2.7		$	12.7
Interest cost	32.0			28.2
Expected return on plan assets	(42.3		)	(54.2		)
Amortization of prior service cost	0.7			0.7
Benefit cost (benefit) — Company plans	(6.9		)	(12.6		)
Pension benefit cost — multi-employer plans	1.7			1.5
Total benefit cost (benefit)	$	(5.2	)	$	(11.1	)

	Postretirement Benefits
	Thirteen weeks ended
	August 26, 2018			August 27, 2017
Service cost	$	0.1		$	—
Interest cost	0.9			0.9
Amortization of prior service benefit	(0.5		)	(0.8		)
Recognized net actuarial gain	(0.4		)	—
Curtailment gain	(0.6		)	—
Total cost (benefit)	$	(0.5	)	$	0.1