PENSION AND POSTRETIREMENT BENEFITS (Tables)

6 Months Ended

Nov. 28, 2021

Compensation And Retirement Disclosure [Abstract]

Components of Pension and Postretirement Plan Costs (Benefits)

Components of pension and postretirement plan costs (benefits) are:

	Pension Plans
	Thirteen Weeks Ended						Twenty-Six Weeks Ended
	November 28, 2021			November 29, 2020			November 28, 2021			November 29, 2020
Service cost	$	2.0		$	3.2		$	4.7		$	6.3
Interest cost		20.8			21.7			41.6			43.4
Expected return on plan assets		(36.3	)		(35.0	)		(72.7	)		(70.0	)
Amortization of prior service cost		0.4			0.6			0.9			1.2
Pension cost (benefit) — Company plans		(13.1	)		(9.5	)		(25.5	)		(19.1	)
Pension cost (benefit) — multi-employer plans		2.4			2.2			4.3			4.0
Total pension cost (benefit)	$	(10.7	)	$	(7.3	)	$	(21.2	)	$	(15.1	)

	Postretirement Plans
	Thirteen Weeks Ended						Twenty-Six Weeks Ended
	November 28, 2021			November 29, 2020			November 28, 2021			November 29, 2020
Service cost	$	0.1		$	—		$	0.1		$	0.1
Interest cost		0.4			0.4			0.7			0.7
Amortization of prior service cost (benefit)		(0.4	)		(0.5	)		(0.9	)		(1.0	)
Recognized net actuarial gain		(1.0	)		(0.9	)		(1.8	)		(1.8	)
Total postretirement cost (benefit)	$	(0.9	)	$	(1.0	)	$	(1.9	)	$	(2.0	)