PENSION AND POSTRETIREMENT BENEFITS (Tables)

9 Months Ended

Feb. 24, 2013

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Components of Pension Benefit and Other Postretirement Benefit Costs

Components of pension benefit and other postretirement benefit costs included:

	Pension Benefits
	Thirteen weeks ended						Thirty-nine weeks ended
	February 24, 2013			February 26, 2012			February 24, 2013			February 26, 2012
Service cost	$	20.6		$	17.2		$	60.9		$	51.4
Interest cost	37.6			37.2			110.8			111.6
Expected return on plan assets	(54.1		)	(48.9		)	(158.6		)	(146.7		)
Amortization of prior service cost	1.0			0.8			2.6			2.3
Curtailment loss	—			—			0.8			—
Benefit cost — Company plans	5.1			6.3			16.5			18.6
Pension benefit cost — multi-employer plans	1.9			1.7			6.2			6.6
Total benefit cost	$	7.0		$	8.0		$	22.7		$	25.2

	Postretirement Benefits
	Thirteen weeks ended						Thirty-nine weeks ended
	February 24, 2013			February 26, 2012			February 24, 2013			February 26, 2012
Service cost	$	0.2		$	0.1		$	0.4		$	0.4
Interest cost	2.6			3.1			7.6			10.0
Amortization of prior service cost	(2.1		)	(3.9		)	(6.3		)	(9.7		)
Recognized net actuarial loss	1.5			2.1			4.5			5.6
Total cost	$	2.2		$	1.4		$	6.2		$	6.3