XML 13 R48.htm IDEA: XBRL DOCUMENT v2.4.0.8
EQUITY AND STOCK-BASED COMPENSATION (Details 2) (USD $)
In Millions, unless otherwise specified
 0 Months Ended 3 Months Ended 0 Months Ended
Jan. 02, 2014
Apr. 01, 2013
Jan. 02, 2013
Mar. 29, 2014
Mar. 29, 2014
Minimum
Mar. 29, 2014
Maximum
Mar. 29, 2014
Restricted stock shares and restricted stock units
Mar. 30, 2013
Restricted stock shares and restricted stock units
Jan. 02, 2014
S&P Composite 1500 Industrials Index
Apr. 01, 2013
S&P Composite 1500 Industrials Index
Jan. 02, 2013
S&P Composite 1500 Industrials Index
Stock-based Compensation                      
Compensation expense             $ 24.7 $ 20.3      
Related tax benefit             $ 8.9 $ 7.3      
Assumptions in determining the fair value of awards granted                      
Annual expected stock price volatility (as a percent) 33.70% 35.50% 36.30%           19.90% 21.20% 22.40%
Annual expected dividend yield (as a percent) 1.02% 1.29% 1.42%                
Risk-free interest rate (as a percent) 0.76% 0.33% 0.37%           0.76% 0.33% 0.37%
Correlation between total shareholder return for SPX and the applicable S&P Index 0.7631 0.7668 0.7778                
Historical period upon which annual expected stock price volatility is based       3 years              
Daily treasury yield curve period upon which average risk-free interest rate is based         1 year 3 years