Note 11 - Pension and Postretirement Benefits (Tables)

9 Months Ended

Feb. 26, 2023

Notes Tables

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Pension Plans
	Thirteen Weeks Ended						Thirty-Nine Weeks Ended
	February 26, 2023			February 27, 2022			February 26, 2023			February 27, 2022
Service cost	$	1.6		$	2.0		$	4.9		$	6.7
Interest cost		31.0			20.9			93.0			62.5
Expected return on plan assets		(36.5	)		(36.4	)		(109.4	)		(109.1	)
Amortization of prior service cost		0.4			0.5			1.1			1.4
Pension cost (benefit) — Company plans		(3.5	)		(13.0	)		(10.4	)		(38.5	)
Pension cost (benefit) — multi-employer plans		2.0			2.0			7.0			6.3
Total pension cost (benefit)	$	(1.5	)	$	(11.0	)	$	(3.4	)	$	(32.2	)

	Postretirement Plans
	Thirteen Weeks Ended						Thirty-Nine Weeks Ended
	February 26, 2023			February 27, 2022			February 26, 2023			February 27, 2022
Service cost	$	—		$	0.1		$	0.1		$	0.2
Interest cost		0.6			0.3			1.7			1.0
Amortization of prior service cost (benefit)		(0.4	)		(0.5	)		(1.3	)		(1.4	)
Recognized net actuarial gain		(1.1	)		(0.9	)		(3.3	)		(2.7	)
Total postretirement cost (benefit)	$	(0.9	)	$	(1.0	)	$	(2.8	)	$	(2.9	)