Retirement Plans (Tables)

9 Months Ended

Feb. 25, 2018

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Cost

Components of net periodic benefit cost are as follows:

	Defined Benefit Plans
	Three Months Ended						Nine Months Ended
(in millions)	February 25, 2018			February 26, 2017			February 25, 2018			February 26, 2017
Interest cost	$	2.1		$	2.5		$	6.4		$	7.6
Expected return on plan assets	(3.0		)	(3.9		)	(9.0		)	(11.9		)
Recognized net actuarial loss	0.7			0.8			2.1			2.4
Net periodic benefit (credit) cost	$	(0.2	)	$	(0.6	)	$	(0.5	)	$	(1.9	)

	Postretirement Benefit Plan
	Three Months Ended						Nine Months Ended
(in millions)	February 25, 2018			February 26, 2017			February 25, 2018			February 26, 2017
Service cost	$	—		$	—		$	0.1		$	0.1
Interest cost	0.2			0.1			0.5			0.5
Amortization of unrecognized prior service credit	(1.2		)	(1.2		)	(3.6		)	(3.6		)
Recognized net actuarial loss	0.4			0.5			1.3			1.3
Net periodic benefit (credit) cost	$	(0.6	)	$	(0.6	)	$	(1.7	)	$	(1.7	)