Pension and Postretirement Benefits (Tables)

3 Months Ended

Aug. 28, 2011

Pension and Postretirement Benefits [Abstract]

Components of pension benefit and other postretirement benefit costs

	Pension Benefits						Postretirement Benefits
	Thirteen weeks ended						Thirteen weeks ended
	August 28,			August 29,			August 28,			August 29,
	2011			2010			2011			2010
Service cost	$	17.1		$	14.9		$	0.2		$	0.1
Interest cost		37.2			36.9			3.7			4.1
Expected return on plan assets		(44.9	)		(43.3	)		—			(0.1	)
Amortization of prior service cost (gain)		0.8			0.8			(2.2	)		(2.4	)
Recognized net actuarial loss		9.6			4.1			1.5			1.2
Curtailment loss		—			1.3			—			—
Benefit cost — Company plans		19.8			14.7			3.2			2.9
Pension benefit cost — multi-employer plans		2.1			2.5			—			—
Total benefit cost	$	21.9		$	17.2		$	3.2		$	2.9