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Discontinued Operation (Details 1) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 01, 2012
Jan. 02, 2011
Jan. 03, 2010
Discontinued Operation (Textual) [Abstract]      
Pretax cash proceeds from sale of general aviation piston engines businesses $ 187.9    
Cash proceeds net of transaction costs 1.9    
Payment of Income tax related to sale 51.3    
Sales for discontinued segment 39.5 133.7 113.1
Operating results (net loss) 0.7 0.6 2.6
Operating results (net of income taxes) $ 0.4 $ 1.2 $ 2.7