PENSION AND POSTRETIREMENT BENEFITS (Tables)

6 Months Ended

Nov. 27, 2016

Compensation and Retirement Disclosure [Abstract]

Components of Pension Benefit and Other Postretirement Benefit Costs

Components of pension benefit and other postretirement benefit costs are (includes amounts related to discontinued operations):

	Pension Benefits
	Thirteen weeks ended						Twenty-six weeks ended
	November 27, 2016			November 29, 2015			November 27, 2016			November 29, 2015
Service cost	$	15.9		$	23.8		$	32.6		$	47.6
Interest cost	29.9			41.0			59.9			82.0
Expected return on plan assets	(53.9		)	(66.8		)	(107.7		)	(133.7		)
Amortization of prior service cost	0.7			0.7			1.3			1.4
Special termination benefits	1.5			—			1.5			—
Benefit cost — Company plans	(5.9		)	(1.3		)	(12.4		)	(2.7		)
Pension benefit cost — multi-employer plans	2.8			4.1			5.1			6.4
Total benefit cost (benefit)	$	(3.1	)	$	2.8		$	(7.3	)	$	3.7

	Postretirement Benefits
	Thirteen weeks ended						Twenty-six weeks ended
	November 27, 2016			November 29, 2015			November 27, 2016			November 29, 2015
Service cost	$	0.1		$	0.1		$	0.1		$	0.2
Interest cost	1.0			1.9			2.1			3.9
Amortization of prior service benefit	(1.6		)	(2.0		)	(3.3		)	(4.0		)
Recognized net actuarial loss	0.1			—			0.2			—
Total cost (benefit)	$	(0.4	)	$	—		$	(0.9	)	$	0.1