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Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Nov. 30, 2013
Dec. 01, 2012
Nov. 30, 2013
Dec. 01, 2012
Jun. 01, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Cumulative translation adjustments at beginning of period     $ (14.0) $ (13.0)  
Translation adjustments 2.8 (0.2) 2.1 2.6  
Balance at end of period (11.9) (10.4) (11.9) (10.4)  
Pension and other post-retirement benefit plans at beginning of period     (110.3) (127.6)  
Adjustments to pension and other post-retirement benefit plans     2.0 0.4  
Balance at end of period (22.7) (115.0) (22.7) (115.0)  
Total accumulated other comprehensive loss (34.6) (125.4) (34.6) (125.4) (124.3)
Cost of Sales [Member]
          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Reclassification Adjustment from AOCI, Pension and Other Postretirement Plans, Tax     15.9 0.7  
Reclassification Adjustment from AOCI, Pension and Other Postretirement Plans, Net of Tax     27.6 1.4  
Operating Expense [Member]
          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Reclassification Adjustment from AOCI, Pension and Other Postretirement Plans, Tax     35.7 6.6  
Reclassification Adjustment from AOCI, Pension and Other Postretirement Plans, Net of Tax     $ 62.0 $ 11.6