PENSION AND POSTRETIREMENT BENEFITS (Tables)

6 Months Ended

Nov. 29, 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						Twenty-six weeks ended
	November 29, 2020			November 24, 2019			November 29, 2020			November 24, 2019
Service cost	$	3.2		$	2.8		$	6.3		$	5.6
Interest cost		21.7			30.7			43.4			62.0
Expected return on plan assets		(35.0	)		(41.6	)		(70.0	)		(82.7	)
Amortization of prior service cost		0.6			0.6			1.2			1.3
Curtailment loss		—			—			—			0.6
Benefit cost (benefit) — Company plans		(9.5	)		(7.5	)		(19.1	)		(13.2	)
Pension benefit cost — multi-employer plans		2.2			2.0			4.0			3.5
Total benefit cost (benefit)	$	(7.3	)	$	(5.5	)	$	(15.1	)	$	(9.7	)

	Postretirement Benefits
	Thirteen weeks ended						Twenty-six weeks ended
	November 29, 2020			November 24, 2019			November 29, 2020			November 24, 2019
Service cost	$	—		$	0.1		$	0.1		$	0.1
Interest cost		0.4			0.6			0.7			1.3
Amortization of prior service benefit		(0.5	)		(0.5	)		(1.0	)		(1.0	)
Recognized net actuarial gain		(0.9	)		(1.1	)		(1.8	)		(2.3	)
Total cost (benefit)	$	(1.0	)	$	(0.9	)	$	(2.0	)	$	(1.9	)