Retirement Plans (Tables)

9 Months Ended

Feb. 26, 2017

Compensation and Retirement Disclosure [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 26, 2017			February 28, 2016			February 26, 2017			February 28, 2016
Interest cost	$	2.5		$	2.7		$	7.6		$	8.0
Expected return on plan assets	(3.9		)	(3.7		)	(11.9		)	(10.9		)
Recognized net actuarial loss	0.8			0.7			2.4			2.1
Net periodic benefit (credit) cost	$	(0.6	)	$	(0.3	)	$	(1.9	)	$	(0.8	)

	Postretirement Benefit Plan
	Three Months Ended						Nine Months Ended
(in millions)	February 26, 2017			February 28, 2016			February 26, 2017			February 28, 2016
Service cost	$	—		$	—		$	0.1		$	0.1
Interest cost	0.1			0.2			0.5			0.6
Amortization of unrecognized prior service credit	(1.2		)	(1.2		)	(3.6		)	(3.6		)
Recognized net actuarial loss	0.5			0.3			1.3			0.9
Net periodic benefit (credit) cost	$	(0.6	)	$	(0.7	)	$	(1.7	)	$	(2.0	)