PENSION AND POSTRETIREMENT BENEFITS (Tables)

6 Months Ended

Nov. 26, 2017

Retirement Benefits [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 26, 2017			November 27, 2016			November 26, 2017			November 27, 2016
Service cost	$	13.2		$	15.9		$	25.9		$	32.6
Interest cost	27.7			29.9			55.9			59.9
Expected return on plan assets	(54.6		)	(53.9		)	(108.8		)	(107.7		)
Amortization of prior service cost	0.7			0.7			1.4			1.3
Recognized net actuarial loss	3.4			—			3.4			—
Special termination benefits	—			1.5			—			1.5
Curtailment loss	0.7			—			0.7			—
Benefit cost (benefit) — Company plans	(8.9		)	(5.9		)	(21.5		)	(12.4		)
Pension benefit cost — multi-employer plans	4.2			2.8			5.7			5.1
Total benefit cost (benefit)	$	(4.7	)	$	(3.1	)	$	(15.8	)	$	(7.3	)

	Postretirement Benefits
	Thirteen weeks ended						Twenty-six weeks ended
	November 26, 2017			November 27, 2016			November 26, 2017			November 27, 2016
Service cost	$	—		$	0.1		$	—		$	0.1
Interest cost	0.9			1.0			1.8			2.1
Amortization of prior service benefit	(0.8		)	(1.6		)	(1.6		)	(3.3		)
Recognized net actuarial loss	—			0.1			—			0.2
Total cost (benefit)	$	0.1		$	(0.4	)	$	0.2		$	(0.9	)