Retirement Plans

9 Months Ended

Feb. 22, 2015

Compensation and Retirement Disclosure [Abstract]

Retirement Plans

Retirement Plans

Components of net periodic benefit cost are as follows:

	Defined Benefit Plans
	Three Months Ended						Nine Months Ended
(in millions)	February 22, 2015			February 23, 2014			February 22, 2015			February 23, 2014
Service cost	$	0.4		$	1.1		$	0.9		$	3.3
Interest cost	2.5			2.6			7.5			7.7
Expected return on plan assets	(3.8		)	(4.3		)	(11.4		)	(12.9		)
Recognized net actuarial loss	0.6			2.2			1.9			6.8
Net periodic benefit (credit) cost	$	(0.3	)	$	1.6		$	(1.1	)	$	4.9

	Postretirement Benefit Plan
	Three Months Ended					Nine Months Ended
(in millions)	February 22, 2015			February 23, 2014		February 22, 2015			February 23, 2014
Service cost	$	0.1		$	0.2	$	0.4		$	0.6
Interest cost	—			0.4		0.8			1.0
Unrecognized prior service cost	(1.6		)	—		(1.6		)	—
Recognized net actuarial loss	0.3			—		0.6			—
Net periodic benefit (credit) cost	$	(1.2	)	$	0.6	$	0.2		$	1.6

During the second quarter of fiscal 2015, the retiree health care plan was changed from a self-insured plan to a retiree health exchange with a subsidy to eligible participants through a Health Reimbursement Account (HRA). As a result of these changes, the plan was remeasured resulting in a $23.7 million pre-tax reduction in the accumulated postretirement benefit obligation which is reflected as a prior year service credit. This credit is being amortized into expense over the expected remaining service period of the fully eligible active participant population and is expected to reduce fiscal 2015 expense by $3.4 million.