Pension and Postretirement Benefits (Tables)

12 Months Ended

May 29, 2011

Pension and Postretirement Benefits [Abstract]

Changes in benefit obligations and plan assets

	Pension Benefits						Other Benefits
	2011			2010			2011			2010
Change in Benefit Obligation
Benefit obligation at beginning of year	$	2,614.1		$	2,220.4		$	324.9		$	288.6
Service cost		59.7			49.8			0.6			0.5
Interest cost		147.5			148.1			16.3			18.3
Plan participants’ contributions		—			—			6.9			7.6
Amendments		1.5			3.0			(9.0	)		6.2
Actuarial loss		190.9			331.1			19.4			42.0
Special termination benefits		1.3			—			—			—
Benefits paid		(133.6	)		(138.3	)		(36.5	)		(38.3	)
Benefit obligation at end of year	$	2,881.4		$	2,614.1		$	322.6		$	324.9
Change in Plan Assets
Fair value of plan assets at beginning of year	$	2,144.6		$	1,903.2		$	4.0		$	8.1
Actual return on plan assets		418.3			268.3			—			—
Employer contributions		129.4			122.6			25.7			26.6
Plan participants’ contributions		—			—			6.9			7.6
Investment and administrative expenses		(14.8	)		(11.2	)		—			—
Benefits paid		(133.6	)		(138.3	)		(36.5	)		(38.3	)
Fair value of plan assets at end of year	$	2,543.9		$	2,144.6		$	0.1		$	4.0

Funded status and Amounts recognized In Balance sheets

	Pension Benefits						Other Benefits
	2011			2010			2011			2010
Funded status	$	(337.5	)	$	(469.5	)	$	(322.5	)	$	(320.9	)
Amounts Recognized in Consolidated Balance Sheets
Other assets	$	14.7		$	0.1		$	—		$	—
Other accrued liabilities		(8.7	)		(8.5	)		(27.5	)		(31.1	)
Other noncurrent liabilities		(343.5	)		(461.1	)		(295.0	)		(289.8	)
Net amount recognized	$	(337.5	)	$	(469.5	)	$	(322.5	)	$	(320.9	)
Amounts Recognized in Accumulated Other Comprehensive (Income) Loss (Pre-tax)
Actuarial net loss	$	417.6		$	473.5		$	75.6		$	61.3
Net prior service cost (benefit)		15.7			17.4			(12.2	)		(12.7	)
Total	$	433.3		$	490.9		$	63.4		$	48.6
Weighted-Average Actuarial Assumptions Used to Determine Benefit Obligations At May 29, 2011 and May 30, 2010
Discount rate		5.30	%		5.80	%		4.90	%		5.40	%
Long-term rate of compensation increase		4.25	%		4.25	%		N/A			N/A

Projected benefit obligation, Accumulated benefit obligation, and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan Assets

	2011		2010
Projected benefit obligation	$	2,505.6	$	2,611.9
Accumulated benefit obligation		2,436.1		2,530.9
Fair value of plan assets		2,153.4		2,142.3

Components of pension benefit and other postretirement benefit costs

	Pension Benefits									Other Benefits
	2011			2010			2009			2011			2010			2009
Service cost	$	59.7		$	49.8		$	50.7		$	0.6		$	0.5		$	0.8
Interest cost		147.5			148.1			141.2			16.3			18.3			20.6
Expected return on plan assets		(173.0	)		(161.2	)		(158.7	)		(0.1	)		(0.3	)		(0.2	)
Amortization of prior service cost (benefit)		3.2			3.2			3.0			(9.6	)		(9.4	)		(11.2	)
Settlement loss		—			1.9			—			—			—			—
Special termination benefits		1.3			—			—			—			—			—
Recognized net actuarial (gain) loss		16.4			3.9			2.1			4.6			(0.1	)		4.8
Curtailment loss		—			0.9			—			—			—			—
Benefit cost—Company plans		55.1			46.6			38.3			11.8			9.0			14.8
Pension benefit cost—multi-employer plans		9.2			9.7			8.6			—			—			—
Total benefit cost	$	64.3		$	56.3		$	46.9		$	11.8		$	9.0		$	14.8

Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss

	Pension Benefits						Other Benefits
	2011			2010			2011			2010
Net actuarial (gain) loss	$	(39.5	)	$	235.2		$	18.9		$	41.9
Prior service cost (benefit)		1.5			3.0			(9.1	)		6.2
Amortization of prior service (cost) benefit		(3.2	)		(4.1	)		9.6			9.4
Recognized net actuarial gain (loss) and settlement loss		(16.4	)		(5.8	)		(4.6	)		0.1
Net amount recognized	$	(57.6	)	$	228.3		$	14.8		$	57.6

Weighted-Average Actuarial Assumption Used to Determine Net Expense

	Pension Benefits									Other Benefits
	2011			2010			2009			2011			2010			2009
Discount rate		5.80	%		6.90	%		6.60	%		5.40	%		6.60	%		6.40	%
Long-term rate of return on plan assets		7.75	%		7.75	%		7.75	%		3.50	%		4.50	%		4.50	%
Long-term rate of compensation increase		4.25	%		4.25	%		4.25	%		N/A			N/A			N/A

Accumulated other comprehensive income (loss)

	Pension Benefits		Other Benefits
Prior service cost (benefit)	$	3.1	$	(8.7	)
Net actuarial loss		38.2		6.0

Fair value of plan assets

	Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	2.7	$	121.5	$	—	$	124.2
Equity securities:
U.S. equity securities		625.7		7.7		—		633.4
International equity securities		473.1		131.5		—		604.6
Fixed income securities:
Government bonds		53.4		155.1		—		208.5
Corporate bonds		103.5		169.5		—		273.0
Mortgage-backed bonds		31.5		58.9		—		90.4
Real Estate		7.8		—		70.3		78.1
Multi-strategy hedge funds		—		—		346.0		346.0
Private equity		—		—		56.0		56.0
Master limited partnerships		125.2		—		—		125.2
Net receivables for unsettled transactions		4.5		—		—		4.5
Total assets	$	1,427.4	$	644.2	$	472.3	$	2,543.9

	Level 1		Level 2		Level 3		Total
Cash and cash equivalents	$	5.0	$	275.5	$	—	$	280.5
Equity securities:
U.S. equity securities		537.2		42.1		—		579.3
International equity securities		366.9		40.3		—		407.2
Fixed income securities:
Government bonds		160.4		160.2		—		320.6
Corporate bonds		38.4		207.3		—		245.7
Mortgage-backed bonds		32.3		67.6		—		99.9
Real Estate		3.0		—		61.4		64.4
Multi-strategy hedge funds		—		—		22.1		22.1
Private equity		—		—		39.1		39.1
Master limited partnerships		49.2		—		—		49.2
Contracts with insurance companies		—		—		31.2		31.2
Net receivables for unsettled transactions		5.4		—		—		5.4
Total assets	$	1,197.8	$	793.0	$	153.8	$	2,144.6

Weighted average asset allocation and target asset allocation

	May 29,			May 30,			Target
	2011			2010			Allocation
Equity Securities		49	%		46	%		42	%
Debt Securities		22	%		31	%		28	%
Real Estate		3	%		3	%		8	%
Multi-strategy Hedge Funds		14	%		1	%		5	%
Private Equity		2	%		2	%		10	%
Other		10	%		17	%		7	%
Total		100	%		100	%

Change in the fair value of the Plan Assets

			Net Realized			Net,
	Fair Value May 30,		and Unrealized			Purchases			Fair Value May 29,
	2010		Gains (Losses)			and Sales			2011
Real Estate	$	61.4	$	7.5		$	1.4		$	70.3
Multi-strategy hedge funds		22.1		34.1			289.8			346.0
Private equity		39.1		8.1			8.8			56.0
Contracts with insurance companies		31.2		(2.4	)		(28.8	)		—
Total	$	153.8	$	47.3		$	271.2		$	472.3

			Net Realized			Net,
	Fair Value May 31,		And Unrealized			Purchases			Fair Value May 30,
	2009		Gains (Losses)			and Sales			2010
Real Estate	$	77.1	$	(17.0	)	$	1.3		$	61.4
Multi-strategy hedge funds		68.9		2.4			(49.2	)		22.1
Private equity		28.5		3.9			6.7			39.1
Contracts with insurance companies		28.9		4.1			(1.8	)		31.2
Total	$	203.4	$	(6.6	)	$	(43.0	)	$	153.8

Assumed Health Care Cost Trend Rates

	May 29,			May 30,
Assumed Health Care Cost Trend Rates at:	2011			2010
Initial health care cost trend rate		7.5	%		8.0	%
Ultimate health care cost trend rate		5.0	%		5.0	%
Year that the rate reaches the ultimate trend rate		2016			2016

Percentage point change in assumed health care cost rates

	One Percent		One Percent
	Increase		Decrease
Effect on total service and interest cost	$	1.3	$	(1.1	)
Effect on postretirement benefit obligation		24.1		(21.7	)

Estimated future gross benefit payments and Medicare Part D subsidy receipts

			Health Care and Life Insurance
	Pension		Benefit		Subsidy
	Benefits		Payments		Receipts
2012	$	148.2	$	32.6	$	(4.3	)
2013		151.9		33.7		(4.5	)
2014		156.2		33.3		(4.5	)
2015		160.8		32.7		(4.6	)
2016		165.7		31.8		(4.6	)
Succeeding 5 years		915.7		139.8		(21.2	)