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Retirement Plans (Defined Benefit And Postretirement Benefit Plans) (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
May 25, 2014
Defined Benefit Plans
May 26, 2013
Defined Benefit Plans
May 27, 2012
Defined Benefit Plans
May 26, 2013
Defined Benefit Plans
U.S. Equities
May 25, 2014
Defined Benefit Plans
U.S. Equities
May 26, 2013
Defined Benefit Plans
Fixed-Income Securities
May 25, 2014
Defined Benefit Plans
Fixed-Income Securities
May 26, 2013
Defined Benefit Plans
International Equities
May 25, 2014
Defined Benefit Plans
International Equities
May 26, 2013
Defined Benefit Plans
Real Assets
May 25, 2014
Defined Benefit Plans
Real Assets
May 25, 2014
Defined Benefit Plans
US Comingled Fund
May 25, 2014
Defined Benefit Plans
U.S. Corporate Securities
May 25, 2014
Defined Benefit Plans
International Comingled Fund
May 25, 2014
Defined Benefit Plans
U.S. Treasury securities
May 25, 2014
Defined Benefit Plans
Emerging Markets Comingled Fund
May 25, 2014
Defined Benefit Plans
Real Estate Funds
May 25, 2014
Defined Benefit Plans
Other Investments
May 25, 2014
Postretirement Benefit Plan
May 26, 2013
Postretirement Benefit Plan
May 25, 2014
Maximum
Defined Benefit Plans
May 25, 2014
10-Year Rates
Defined Benefit Plans
May 25, 2014
15-Year Rates
Defined Benefit Plans
May 25, 2014
20-Year Rates
Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]                                                
Expected employer contribution to the benefit plans                                     $ 1.1   $ 0.4      
Expected long-term rate of return on plan assets (percentage) 8.00% [1] 9.00% [1] 9.00%                                          
Actual rate of return on plan assets (percentage)                                           9.30% 8.40% 9.90%
Target asset fund allocation (percentage)       40.00% 37.00% 35.00% 40.00% 20.00% 18.50% 5.00% 4.50%                          
Concentration of market risk related to large investments in a single fund or sector (percentage)                       35.90% 19.70% 12.80% 11.30% 5.50% 5.40% 5.00%            
Effect of quarter percentage point change in discount rate on earnings before income taxes 0.6                                              
Effect of quarter percentage point change in expected long term rate of return on plan assets on earnings before income taxes 0.5                                              
Assumed health care cost trend rate increase in per-capita charges (percentage)                                     6.80%          
Ultimate health care cost trend rate (percentage)                                     5.00%          
Year that rate reaches ultimate trend rate                                     2021          
Effect of one percentage point increase on service and interest cost components                                     0.5          
Effect of one percentage point decrease on service and interest cost components                                     0.4          
Effect of one percentage point increase on accumulated postretirement benefit obligation                                     7.4          
Effect of one percentage point decrease on accumulated postretirement benefit obligation                                     5.9          
Amortization of net actuarial loss 2.6                                   0.5          
Plan curtailments 6.4 0                                 4.8 0        
Plan amendments $ 0.6 $ 0                                 $ 0 $ 0        
[1] Determined as of the beginning of fiscal year.