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Retirement Benefits and Postemployment Benefits (Tables)
12 Months Ended
May 26, 2013
RETIREMENT BENEFITS AND POSTEMPLOYMENT BENEFITS [Abstract]  
Health Care Cost Trend Rates [Table Text Block]
 Fiscal Year
 2013 2012
Health care cost trend rate for next year8.0% 8.5%
Rate to which the cost trend rate is assumed to decline (ultimate rate)5.2% 5.2%
Year that the rate reaches the ultimate trend rate2019 2019
Effect of One Percentage Point Change in Health Care Cost Trend Rate [Table Text Block]
In Millions One Percentage Point Increase One Percentage Point Decrease
Effect on the aggregate of the service and interest cost components in fiscal 2014$ 5.2$ (4.4)
Effect on the other postretirement accumulated benefit obligation as of May 26, 2013  93.8  (82.9)
Changes in Fair Value of Plan Assets and Projected Benefit Obligations [Table Text Block]
  Defined Benefit Pension Plans  Other Postretirement Benefit Plans  Postemployment Benefit Plans
  Fiscal Year  Fiscal Year  Fiscal Year
In Millions 2013  2012  2013  2012  2013  2012
Change in Plan Assets:                 
Fair value at beginning of year$ 4,353.9 $ 4,264.0 $ 358.8 $ 353.8      
Actual return on assets  698.7   56.3   67.9   (4.8)      
Employer contributions  223.1   222.1   0.1   0.1      
Plan participant contributions  15.2   20.3   13.0   12.2      
Benefits payments  (222.6)   (203.3)   (2.9)   (2.5)      
Foreign currency   (2.2)   (5.5)   -   -      
Fair value at end of year$ 5,066.1 $ 4,353.9 $ 436.9 $ 358.8      
Change in Projected Benefit Obligation:                 
Benefit obligation at beginning of year$ 4,991.5 $ 4,458.4 $ 1,129.0 $ 1,065.8 $ 141.3 $ 131.3
Service cost  124.4   114.3   21.6   18.0   7.8   7.5
Interest cost  237.3   237.9   52.1   55.6   4.4   4.8
Plan amendment  0.2   (13.4)   -   -   4.5   -
Curtailment/other  -   (27.1)   -   0.1   11.4   11.9
Plan participant contributions  15.2   20.3   13.0   12.2   -   -
Medicare Part D reimbursements  -   -   4.1   4.7   -   -
Actuarial loss (gain)  237.5   405.7   (23.0)   28.4   (10.4)   5.5
Benefits payments   (222.8)   (203.5)   (58.9)   (55.5)   (13.6)   (19.6)
Foreign currency   (1.9)   (5.9)   (0.1)   (0.3)   -   (0.1)
Acquisitions  -   4.8   10.4   -   -   -
Projected benefit obligation at end of year$ 5,381.4 $ 4,991.5 $ 1,148.2 $ 1,129.0 $ 145.4 $ 141.3
Plan assets less than benefit obligation as of fiscal year end$ (315.3) $ (637.6) $ (711.3) $ (770.2) $ (145.4) $ (141.3)
Amounts Recognized in AOCI [Table Text Block]
   Defined Benefit Pension Plans  Other Postretirement Benefit Plans  Postemployment Benefit Plans  Total
   Fiscal Year Fiscal Year Fiscal Year Fiscal Year
In Millions  2013  2012  2013  2012  2013  2012  2013  2012
Net actuarial loss $ (1,625.1) $ (1,714.1) $ (168.2) $ (215.0) $ (8.2) $ (16.8) $ (1,801.5) $ (1,945.9)
Prior service (costs) credits   (18.5)   (22.0)   16.6   19.0   (5.9)   (4.2)   (7.8)   (7.2)
Amounts recorded in accumulated other comprehensive loss $ (1,643.6) $ (1,736.1) $ (151.6) $ (196.0) $ (14.1) $ (21.0) $ (1,809.3) $ (1,953.1)
Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]
   Defined Benefit Pension Plans  Other Postretirement Benefit Plans  Postemployment Benefit Plans
   Fiscal Year  Fiscal Year  Fiscal Year
In Millions  2013  2012  2013  2012  2013  2012
Projected benefit obligation $ 396.9 $ 423.4 $ - $ - $ - $ -
Accumulated benefit obligation   346.6   361.5   1,132.9   1,129.0   145.4   141.3
Plan assets at fair value   9.5   53.0   436.9   358.8   -   -
Components of Net Periodic Benefit Expense [Table Text Block]
  Defined Benefit Pension Plans Other Postretirement Benefit Plans Postemployment Benefit Plans
  Fiscal Year Fiscal Year Fiscal Year
In Millions 2013 2012 2011 2013 2012 2011 2013 2012 2011
Service cost$ 124.4$ 114.3$ 101.4$ 21.6$ 18.0$ 18.7$ 7.8$ 7.5$ 8.0
Interest cost  237.3  237.9  230.9  52.1  55.6  60.1  4.4  4.8  5.1
Expected return on plan assets  (428.0)  (440.3)  (408.5)  (32.1)  (35.5)  (33.2)  -  -  -
Amortization of losses  136.0  108.1  81.4  17.1  14.5  14.4  2.1  1.7  2.1
Amortization of prior service costs (credits)  6.2  8.6  9.0  (3.4)  (3.4)  (0.6)  1.9  2.1  2.4
Other adjustments  -  -  -  -  -  -  11.4  12.0  4.2
Net expense $ 75.9$ 28.6$ 14.2$ 55.3$ 49.2$ 59.4$ 27.6$ 28.1$ 21.8
Amounts Expected to be Recognized Over Next Fiscal Year [Table Text Block]
In Millions  Defined Benefit Pension Plans  Other Postretirement Benefit Plans  Postemployment Benefit Plans
Amortization of losses  $ 151.1  $ 15.4  $ 0.6
Amortization of prior service costs (credits)   5.6   (3.4)   2.4
Weighted-Average Assumptions Used to Determine Fiscal Year-End Benefit Obligations [Table Text Block]
 Defined Benefit Pension Plans Other Postretirement Benefit Plans Postemployment Benefit Plans
 Fiscal Year Fiscal Year Fiscal Year
 2013 2012  2013 2012  2013 2012 
Discount rate 4.54% 4.85%  4.50% 4.70%  3.70% 3.86%
Rate of salary increases 4.44  4.44   -  -   4.44  4.45 
Weighted-Average Assumptions Used to Determine Fiscal Year-End Net Periodic Benefit Expense [Table Text Block]
 Defined Benefit Pension Plans  Other Postretirement Benefit Plans Postemployment Benefit Plans
 Fiscal Year  Fiscal Year Fiscal Year
 2013 2012 2011  2013 2012 2011  2013 2012 2011 
Discount rate 4.85% 5.45% 5.85%  4.70% 5.35% 5.80%  3.86% 4.77% 5.12%
Rate of salary increases 4.44  4.92  4.93   -  -  -   4.45  4.92  4.93 
Expected long-term rate of return on plan assets 8.53  9.52  9.53   8.13  9.32  9.33   -  -  - 
Fair Value Of Plan Assets [Table Text Block]
 May 26, 2013 May 27, 2012
In Millions Level 1  Level 2  Level 3 Total Assets  Level 1  Level 2  Level 3 Total Assets
Fair value measurement of pension plan assets:                 
Equity (a)$ 1,439.4$ 828.3$ 559.3$ 2,827.0 $ 1,119.2$ 717.6$ 575.4$ 2,412.2
Fixed income (b)  476.6  801.0  -  1,277.6   506.1  647.2  -  1,153.3
Real asset investments (c)   131.1  169.1  430.4  730.6   135.0  88.9  361.2  585.1
Other investments (d)  -  60.9  0.3  61.2   -  49.6  0.3  49.9
Cash and accruals  169.7  -  -  169.7   153.4  -  -  153.4
Total fair value measurement of pension plan assets$ 2,216.8$ 1,859.3$ 990.0$ 5,066.1 $ 1,913.7$ 1,503.3$ 936.9$ 4,353.9
                  
Fair value measurement of postretirement benefit plan assets:                 
Equity (a)$ 93.1$ 92.0$ 20.2$ 205.3 $ 12.6  135.4  22.0  170.0
Fixed income (b)  17.2  50.3  -  67.5   15.7  39.1  -  54.8
Real asset investments (c)   1.8  7.1  14.5  23.4   4.3  5.7  8.4  18.4
Other investments (d)  -  130.9  -  130.9   -  104.9  -  104.9
Cash and accruals  9.8  -  -  9.8   10.7  -  -  10.7
Fair value measurement of postretirement benefit plan assets$ 121.9$ 280.3$ 34.7$ 436.9 $ 43.3$ 285.1$ 30.4$ 358.8

(a)       Primarily publicly traded common stock and private equity partnerships for purposes of total return and to maintain equity exposure consistent with policy allocations. Investments include: United States and international equity securities, mutual funds, and equity futures valued at closing prices from national exchanges; and commingled funds, privately held securities, and private equity partnerships valued at unit values or net asset values provided by the investment managers, which are based on the fair value of the underlying investments. Various methods are used to determine fair values and may include the cost of the investment, most recent financing, and expected cash flows. For some of these investments, realization of the estimated fair value is dependent upon transactions between willing sellers and buyers.

(b)       Primarily government and corporate debt securities for purposes of total return and managing fixed income exposure to policy allocations. Investments include: fixed income securities and bond futures generally valued at closing prices from national exchanges, fixed income pricing models, and independent financial analysts; and fixed income commingled funds valued at unit values provided by the investment managers, which are based on the fair value of the underlying investments.

(c)        Publicly traded common stock and limited partnerships in the energy and real estate sectors for purposes of total return. Investments include: energy and real estate securities generally valued at closing prices from national exchanges; and commingled funds, private securities, and limited partnerships valued at unit values or net asset values provided by the investment managers, which are generally based on the fair value of the underlying investments.

(d)        Global balanced fund of equity, fixed income, and real estate securities for purposes of meeting Canadian pension plan asset allocation policies, and insurance and annuity contracts to provide a stable stream of income for retirees and to fund postretirement medical benefits. Fair values are derived from unit values provided by the investment managers, which are generally based on the fair value of the underlying investments and contract fair values from the providers.

 

Effect Of Significant Unobservable Inputs Changes In Plan Assets [Table Text Block]
 Fiscal 2013
In Millions Balance as of May 27, 2012 Net Transfers Out Net Purchases, Sales Issuances, and Settlements Net Gain Balance as of May 26, 2013
Pension benefit plan assets:          
Equity$ 575.4$ (0.1)$ (61.0)$ 45.0$ 559.3
Fixed income  -  -  -  -  -
Real asset investments  361.2  -  48.3  20.9  430.4
Other investments  0.3  -  -  -  0.3
Fair value activity of level 3 pension plan assets$ 936.9$ (0.1)$ (12.7)$ 65.9$ 990.0
           
Postretirement benefit plan assets:          
Equity$ 22.0$ -$ (2.3)$ 0.5$ 20.2
Fixed income  -  -  -  -  -
Real asset investments  8.4  -  4.8  1.3  14.5
Fair value activity of level 3 postretirement benefit plan assets$ 30.4$ -$ 2.5$ 1.8$ 34.7

 Fiscal 2012
In Millions Balance as of May 29, 2011 Net Transfers Out Net Purchases, Sales Issuances, and Settlements Net Gain (Loss) Balance as of May 27, 2012
Pension benefit plan assets:          
Equity$ 568.5$ (1.2)$ (28.4)$ 36.5$ 575.4
Fixed income  0.2  -  (0.2)  -  -
Real asset investments  356.9  (48.9)  32.8  20.4  361.2
Other investments  0.3  -  -  -  0.3
Fair value activity of level 3 pension plan assets$ 925.9$ (50.1)$ 4.2$ 56.9$ 936.9
           
Postretirement benefit plan assets:          
Equity$ 26.3$ -$ (4.1)$ (0.2)$ 22.0
Fixed income  0.2  -  -  (0.2)  -
Real asset investments  13.6  (4.0)  (1.1)  (0.1)  8.4
Fair value activity of level 3 postretirement benefit plan assets$ 40.1$ (4.0)$ (5.2)$ (0.5)$ 30.4
Weighted-Average Asset Allocations [Table Text Block]
 Defined Benefit Pension Plans  Other Postretirement Benefit Plans
 Fiscal Year  Fiscal Year
 2013 2012  2013 2012 
Asset category:         
United States equities 29.5% 28.7%  39.4% 38.4%
International equities 17.3  15.7   21.6  19.9 
Private equities 11.2  13.3   4.7  6.2 
Fixed income 27.5  28.6   28.9  30.3 
Real assets 14.5  13.7   5.4  5.2 
Total 100.0% 100.0%  100.0% 100.0%
Expected Benefit Payments [Table Text Block]
In Millions  Defined Benefit Pension Plans  Other Postretirement Benefit Plans Gross Payments  Medicare Subsidy Receipts  Postemployment Benefit Plans
2014 $ 236.3 $ 56.8 $ 4.7 $ 18.8
2015   243.6   60.4   5.2   17.4
2016   251.6   62.4   5.6   16.3
2017   260.6   63.8   6.1   15.3
2018   270.1   66.7   6.5   14.7
2019-2023   1,512.3   371.3   28.5   66.4