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Retirement Plans (Tables)
 12 Months Ended
May 27, 2012
Compensation and Retirement Disclosure [Abstract]  
Funding Of Defined Benefit Pension Plans And Postretirement Benefit Plans
Fundings related to the defined benefit pension plans and postretirement benefit plans, which are funded on a pay-as-you-go basis, were as follows:

(in millions)
Fiscal Year
 
2012

2011

2010
Defined benefit pension plans funding
$
22.2

 
$
12.9

 
$
0.4

Postretirement benefit plan funding
0.5

 
0.3

 
0.6
Change In Benefit Obligation
The following provides a reconciliation of the changes in the plan benefit obligation, fair value of plan assets and the funded status of the plans as of May 27, 2012 and May 29, 2011:

(in millions)
Defined Benefit Plans
 
Postretirement Benefit Plan
 
2012
 
2011
 
2012
 
2011
Change in Benefit Obligation:
 
 
 
 
 
 
 
Benefit obligation at beginning of period
$
215.8

 
$
200.2

 
$
27.0

 
$
38.9

Service cost
5.1

 
5.9

 
0.8

 
0.9

Interest cost
9.6

 
9.5

 
1.5

 
2.3

Plan amendments
—

 
—

 
—

 
—

Participant contributions
—

 
—

 
0.3

 
0.4

Benefits paid
(9.8
)
 
(8.9
)
 
(0.8
)
 
(0.7
)
Actuarial loss (gain)
53.7

 
9.1

 
0.8

 
(14.8
)
Benefit obligation at end of period
$
274.4

 
$
215.8

 
$
29.6

 
$
27.0
Change In Plan Assets
Change in Plan Assets:
 
 
 
 
 
 
 
Fair value at beginning of period
$
187.4

 
$
154.6

 
$
—

 
$
—

Actual return on plan assets
3.7

 
28.8

 
—

 
—

Employer contributions
22.2

 
12.9

 
0.5

 
0.3

Participant contributions
—

 
—

 
0.3

 
0.4

Benefits paid
(9.8
)
 
(8.9
)
 
(0.8
)
 
(0.7
)
Fair value at end of period
$
203.5

 
$
187.4

 
$
—

 
$
—
Reconciliation Of The Plan's Funded Status
Reconciliation of the Plans’ Funded Status:
 
 
 
 

 

Unfunded status at end of period
$
(70.9
)
 
$
(28.4
)
 
$
(29.6
)
 
$
(27.0
)
Funded Status And Amounts Recognized In Accumulated Other Comprehensive Income (Loss)
The following is a detail of the balance sheet components of each of our plans and a reconciliation of the amounts included in accumulated other comprehensive income (loss):

(in millions)
Defined Benefit Plans
 
Postretirement Benefit Plan
  
May 27,
2012

May 29,
2011
 
May 27,
2012

May 29,
2011
Components of the Consolidated Balance Sheets:
 
 
 
 
 
 
 
Current liabilities
$
—

 
$
0.4

 
$
—

 
$
0.7

Non-current liabilities
70.9

 
28.0

 
29.6

 
26.3

Net amounts recognized
$
70.9

 
$
28.4

 
$
29.6

 
$
27.0

Amounts Recognized in Accumulated Other Comprehensive Income (Loss), net of tax:
 
 
 
 
 
 
 
Prior service (cost) credit
$
(0.2
)
 
$
(0.3
)
 
$
0.1

 
$
0.1

Net actuarial loss
(87.4
)
 
(50.5
)
 
(1.9
)
 
(1.3
)
Net amounts recognized
$
(87.6
)
 
$
(50.8
)
 
$
(1.8
)
 
$
(1.2
)
Accumulated Benefit Obligations In Excess Of Plan Assets
The following is a summary of our accumulated and projected benefit obligations:
(in millions)
May 27, 2012

 
May 29, 2011

Accumulated benefit obligation for all pension plans
$
265.0

 
$
211.8

Pension plans with accumulated benefit obligations in excess of plan assets:
 
 
 
Accumulated benefit obligation
265.0

 
211.8

Fair value of plan assets
203.5

 
187.4

Projected benefit obligations for all plans with projected benefit obligations in excess of plan assets
274.4

 
215.8
Weighted-Average Assumptions Used
The following table presents the weighted-average assumptions used to determine benefit obligations and net expense:

  
Defined Benefit Plans
 
Postretirement Benefit Plan
 
2012
 
2011
 
2012
 
2011
Weighted-average assumptions used to determine benefit obligations at May 27 and May 29 (1)
 
 
 
 
 
 
 
Discount rate
4.35
%
 
5.37
%
 
4.52
%
 
5.46
%
Rate of future compensation increases
4.22
%
 
3.75
%
 
N/A

 
N/A

Weighted-average assumptions used to determine net expense for fiscal years ended May 27 and May 29 (2)
 
 
 
 
 
 
 
Discount rate
5.37
%
 
5.89
%
 
5.46
%
 
5.98
%
Expected long-term rate of return on plan assets
9.00
%
 
9.00
%
 
N/A

 
N/A

Rate of future compensation increases
3.75
%
 
3.75
%
 
N/A

 
N/A

(1)  Determined as of the end of fiscal year.
(2)  Determined as of the beginning of fiscal year.
Components Of Net Periodic Benefit Cost
Components of net periodic benefit cost included in continuing operations are as follows:

(in millions)
Defined Benefit Plans
 
Postretirement Benefit Plan
  
2012
 
2011
 
2010
 
2012
 
2011
 
2010
Service cost
$
5.1

 
$
5.9

 
$
4.9

 
$
0.8

 
$
0.9

 
$
0.6

Interest cost
9.6

 
9.5

 
10.0

 
1.5

 
2.3

 
1.9

Expected return on plan assets
(17.8
)
 
(16.6
)
 
(16.4
)
 
—

 
—

 
—

Amortization of unrecognized prior service cost
0.1

 
0.1

 
0.1

 
(0.1
)
 
—

 
—

Recognized net actuarial loss
8.2

 
4.5

 
0.3

 
—

 
1.3

 
0.6

Net pension and postretirement cost (benefit)
$
5.2

 
$
3.4

 
$
(1.1
)
 
$
2.2

 
$
4.5

 
$
3.1
Fair Values Of Defined Benefit Pension Plans Assets
The fair values of the defined benefit pension plans assets at their measurement dates of May 27, 2012 and May 29, 2011, are as follows:

 
 
 
Items Measured at Fair Value at May 27, 2012
(in millions)
 
 
Fair Value
of Assets
(Liabilities)
  
  
  
Quoted Prices
in Active
Market for
Identical Assets
(Liabilities)
(Level 1)
  
  
  
  
  
  
Significant
Other
Observable
Inputs
(Level 2)
  
  
  
  
  
Significant
Unobservable
Inputs
(Level 3)
Equity:
 
 
 
 
 
 
 
 
 
U.S. Commingled Funds
(1)
 
$
80.5

 
$
—

 
$
80.5

 
$
—

International Commingled Funds
(2)
 
26.8

 
—

 
26.8

 
—

Emerging Market Commingled Funds
(3)
 
11.3

 
—

 
11.3

 
—

Real Estate Commingled Funds
(4)
 
10.0

 
—

 
10.0

 
—

Fixed-Income:
 
 
 
 
 
 
 
 
 
U.S. Treasuries
(5)
 
20.0

 
20.0

 
—

 
—

U.S. Corporate Securities
(5)
 
37.7

 
—

 
37.7

 
—

International Securities
(5)
 
2.7

 
—

 
2.7

 
—

Public Sector Utility Securities
(5)
 
10.4

 
—

 
10.4

 
—

Cash & Accruals
 
 
4.1

 
4.1

 
—

 
—

Total
 
 
$
203.5

 
$
24.1

 
$
179.4

 
$
—

 
(1)
U.S. commingled funds are comprised of investments in funds that purchase publicly traded U.S. common stock for total return purposes. Investments are valued at unit values provided by the investment managers which are based on the fair value of the underlying investments. There are no redemption restrictions associated with these funds.
(2)
International commingled funds are comprised of investments in funds that purchase publicly traded non-U.S. common stock for total return purposes. Investments are valued at unit values provided by the investment managers which are based on the fair value of the underlying investments. There are no redemption restrictions associated with these funds.
(3)
Emerging market commingled funds and developed market securities are comprised of investments in funds that purchase publicly traded common stock of non-U.S. companies for total return purposes. Funds are valued at unit values provided by the investment managers which are based on the fair value of the underlying investments. There are no redemption restrictions associated with these funds.
(4)
Real estate commingled funds are comprised of investments in funds that purchase publicly traded common stock of real estate securities for purposes of total return. These investments are valued at unit values provided by the investment managers which are based on the fair value of the underlying investments. There are no redemption restrictions associated with these funds.
(5)
Fixed income securities are comprised of investments in government and corporate debt securities. These securities are valued by the trustee at closing prices from national exchanges or pricing vendors on the valuation date.

  
 
 
Items Measured at Fair Value at May 29, 2011
(in millions)
 
 
Fair Value
of Assets
(Liabilities)
 
Quoted Prices
in Active
Market for
Identical Assets
(Liabilities)
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Equity:
 
 
 
 
 
 
 
 
 
U.S. & International
(1)
 
$
37.9

 
$
37.9

 
$
—

 
$
—

U.S. Mutual & Commingled Funds
(2)
 
22.1

 
1.6

 
20.5

 
—

Developed Market Equity Funds
(3)
 
19.7

 
11.7

 
8.0

 
—

Emerging Market Equity Funds
(3)
 
6.9

 
—

 
6.9

 
—

Private Equity Partnerships
(4)
 
25.6

 
—

 
—

 
25.6

Private Equity Securities
(5)
 
—

 
—

 
—

 
—

Fixed-Income:
 
 

 

 

 

Fixed-income Securities
(6)
 
43.2

 
38.3

 
4.9

 
—

Energy & Real Estate Public Sector
(7)
 
9.1

 
—

 
4.8

 
4.3

Real Asset Commingled Funds
(8)
 
4.0

 
—

 
4.0

 
—

Real Asset Private Funds
(9)
 
10.8

 
—

 
—

 
10.8

Cash & Accruals
 
 
8.1

 
8.1

 
—

 
—

Total
 
 
$
187.4

 
$
97.6

 
$
49.1

 
$
40.7

(1)
U.S. equity securities and international equity securities are comprised of investments in common stock of U.S. and non-U.S. companies for total return purposes. These investments are valued by the trustee at closing prices from national exchanges on the valuation date.
(2)
U.S. mutual and commingled funds are comprised of investments in funds that purchase publicly traded U.S. common stock for total return purposes. Investments are valued at unit values provided by the investment managers which are based on the fair value of the underlying investments.
(3)
Emerging market equity funds and developed market securities are comprised of investments in funds that purchase publicly traded common stock of non-U.S. companies for total return purposes. Funds are valued at unit values provided by the investment managers which are based on the fair value of the underlying investments.
(4)
Private equity partnerships are comprised of investments in limited partnerships that invest in private companies for total return purposes. The investments are valued at fair value which is generally based on the net asset value or capital balance as reported by the partnerships subject to the review and approval of the investment managers and their consultants. As there is not a liquid market for some of these investments, realization of the estimated fair value of such investments is dependent upon transactions between willing sellers and buyers.
(5)
Private equity securities are comprised of investments in publicly traded common stock that were received as a distribution from a private equity partnership as well as equity investments in private companies for total return purposes. Stocks received from private equity distributions are valued by the trustee at closing prices from national exchanges on the valuation date. Investments in private companies are valued by management based upon information provided by the respective third-party investment manager who considers factors such as the cost of the investment, most recent round of financing, and expected future cash flows
(6)
Fixed income securities are comprised of investments in government and corporate debt securities. These securities are valued by the trustee at closing prices from national exchanges or pricing vendors on the valuation date. Unlisted investments are valued at prices quoted by various national markets, fixed income pricing models and/or independent financial analysts.
(7)
Energy and real estate securities are comprised of investments in publicly traded common stock of energy companies and real estate investment trusts for purposes of total return. These securities are valued by the trustee at closing prices from national exchanges on the valuation date. Unlisted investments are valued at prices quoted by various national markets and publications and/or independent financial analysts.
(8)
Real asset commingled funds are comprised of investments in funds that purchase publicly traded common stock of energy companies or real estate investment trusts for purposes of total return. These investments are valued at unit values provided by the investment managers which are based on the fair value of the underlying investments.
(9)
Real asset private funds are comprised of interests in limited partnerships that invest in private companies in the energy industry and private real estate properties for purposes of total return. These interests are valued at fair value which is generally based on the net asset value or capital balance as reported by the partnerships subject to the review and approval of the investment managers and their consultants. As there is not a liquid market for some of these investments, realization of the estimated fair value of such investments is dependent upon transactions between willing sellers and buyers.
Changes In Level 3 Investments For Defined Benefit Pension Plans
The following table presents the changes in Level 3 investments for the defined benefit pension plans at May 27, 2012:
 
 
Fair Value Measurements Using
Significant Unobservable Inputs (Level 3) 
(in millions)
 
Private
Equity
Partnerships
 
Private
Equity
Securities
 
Energy &
Real Estate
Public Sector
 
Real Asset
Private Funds
 
Total
Beginning balance at May 29, 2011
 
$
25.6

 
$
—

 
$
4.3

 
$
10.8

 
$
40.7

Actual return on plan assets:
 

 

 

 

 
 
Relating to assets still held at the reporting date
 
—

 
—

 
—

 
—

 
—

Relating to assets sold during the period
 
0.3

 
—

 
—

 
—

 
0.3

Purchases, sales and settlements
 
(25.9
)
 
—

 
(4.3
)
 
(10.8
)
 
(41.0
)
Transfers in and/or out of Level 3
 
 
—

 
—

 
—

 
—

 
—

Ending balance at May 27, 2012
 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
The following table presents the changes in Level 3 investments for the defined benefit pension plans at May 29, 2011:
 
 
 
Fair Value Measurements Using
Significant Unobservable Inputs (Level 3) 
(in millions)
 
Private
Equity
Partnerships
 
Private
Equity
Securities
 
Energy &
Real Estate
Public Sector
 
Real Asset
Private Funds
 
Total
Beginning balance at May 30, 2010
 
$
22.9

 
$
0.1

 
$
4.2

 
$
9.2

 
$
36.4

Actual return on plan assets:
 

 

 

 

 
 
Relating to assets still held at the reporting date
 
2.8

 
(0.1
)
 
0.1

 
0.3

 
3.1

Relating to assets sold during the period
 
2.0

 
—

 
—

 
0.6

 
2.6

Purchases, sales, and settlements
 
(2.1
)
 
—

 
—

 
0.7

 
(1.4
)
Transfers in and/or out of Level 3
 
—

 
—

 
—

 
—

 
—

Ending balance at May 29, 2011
 
$
25.6

 
$
—

 
$
4.3

 
$
10.8

 
$
40.7
Expected Benefit Payments
The following benefit payments are expected to be paid between fiscal 2013 and fiscal 2022:

(in millions)
 
Defined Benefit Plans
 
Postretirement Benefit Plan
2013
 
$
10.0

 
$
0.7

2014
 
10.4

 
0.7

2015
 
10.9

 
0.8

2016
 
11.5

 
0.9

2017
 
12.4

 
0.9

2018-2022
 
74.6

 
6.0