XML 103 R103.htm IDEA: XBRL DOCUMENT v3.2.0.727
Retirement Plans (Defined Benefit And Postretirement Benefit Plans) (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
May. 31, 2015
Nov. 23, 2014
May. 31, 2015
May. 25, 2014
May. 26, 2013
Defined Benefit Plans          
Defined Benefit Plan Disclosure [Line Items]          
Expected long-term rate of return on plan assets (percentage)     7.00% [1] 8.00% [1] 9.00%
Effect of quarter percentage point change in discount rate on earnings before income taxes     $ 0    
Effect of quarter percentage point change in expected long term rate of return on plan assets on earnings before income taxes     500,000    
Amortization of net actuarial gain (loss)     (2,800,000)    
Settlement loss recognized $ 6,100,000   $ 6,100,000 $ 0 $ 0
Defined Benefit Plans | U.S. Equities          
Defined Benefit Plan Disclosure [Line Items]          
Target asset fund allocation (percentage)     41.00%    
Defined Benefit Plans | Fixed-Income Securities          
Defined Benefit Plan Disclosure [Line Items]          
Target asset fund allocation (percentage)     40.00%    
Defined Benefit Plans | International Equities          
Defined Benefit Plan Disclosure [Line Items]          
Target asset fund allocation (percentage)     16.00%    
Defined Benefit Plans | Real Assets          
Defined Benefit Plan Disclosure [Line Items]          
Target asset fund allocation (percentage)     3.00%    
Defined Benefit Plans | US Comingled Fund          
Defined Benefit Plan Disclosure [Line Items]          
Concentration of market risk related to large investments in a single fund or sector (percentage)     32.00%    
Defined Benefit Plans | U.S. Corporate Securities          
Defined Benefit Plan Disclosure [Line Items]          
Concentration of market risk related to large investments in a single fund or sector (percentage)     17.50%    
Defined Benefit Plans | International Comingled Fund          
Defined Benefit Plan Disclosure [Line Items]          
Concentration of market risk related to large investments in a single fund or sector (percentage)     10.80%    
Defined Benefit Plans | U.S. Treasury securities          
Defined Benefit Plan Disclosure [Line Items]          
Concentration of market risk related to large investments in a single fund or sector (percentage)     10.60%    
Defined Benefit Plans | Global Fixed Income Commingled Fund          
Defined Benefit Plan Disclosure [Line Items]          
Concentration of market risk related to large investments in a single fund or sector (percentage)     10.20%    
Defined Benefit Plans | Real Estate Funds          
Defined Benefit Plan Disclosure [Line Items]          
Concentration of market risk related to large investments in a single fund or sector (percentage)     6.10%    
Defined Benefit Plans | Emerging Markets Comingled Fund          
Defined Benefit Plan Disclosure [Line Items]          
Concentration of market risk related to large investments in a single fund or sector (percentage)     5.60%    
Defined Benefit Plans | Other Investments          
Defined Benefit Plan Disclosure [Line Items]          
Concentration of market risk related to large investments in a single fund or sector (percentage)     5.00%    
Postretirement Benefit Plan          
Defined Benefit Plan Disclosure [Line Items]          
Expected employer contribution to the benefit plans     $ 1,100,000.0    
Effect of quarter percentage point change in discount rate on earnings before income taxes     100,000    
Amortization of net actuarial gain (loss)     3,800,000    
Pension and other postretirement benefit plans, plan amendments   $ (23,700,000)      
Expected reduction to pension and other postretirement benefit expense     3,400,000    
Settlement loss recognized     0 $ 0 $ 0
Maximum | Defined Benefit Plans          
Defined Benefit Plan Disclosure [Line Items]          
Expected employer contribution to the benefit plans     $ 400,000.0    
10-Year Rates | Defined Benefit Plans          
Defined Benefit Plan Disclosure [Line Items]          
Actual rate of return on plan assets (percentage)     8.30%    
15-Year Rates | Defined Benefit Plans          
Defined Benefit Plan Disclosure [Line Items]          
Actual rate of return on plan assets (percentage)     7.80%    
20-Year Rates | Defined Benefit Plans          
Defined Benefit Plan Disclosure [Line Items]          
Actual rate of return on plan assets (percentage)     9.60%    
[1] Determined as of the beginning of fiscal year.