Quarterly report pursuant to Section 13 or 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME (Reclassifications Out Of Accumulated Other Comprehensive Income) (Detail)

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ACCUMULATED OTHER COMPREHENSIVE INCOME (Reclassifications Out Of Accumulated Other Comprehensive Income) (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Amortization of pension and other postretirement plan items:        
Total net periodic benefit cost, net of tax $ 2.2 $ 3.1 $ 6.4 $ 8.4
Reclassification out of Accumulated Other Comprehensive Income [Member]
       
Amortization of pension and other postretirement plan items:        
Prior service cost     0.3 [1]  
Recognized actuarial loss     (9.9) [1]  
Total net periodic benefit cost, before tax     (9.6)  
Total net periodic benefit cost, tax benefit     3.6  
Total net periodic benefit cost, net of tax     $ (6.0)  
[1] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 9 Benefit Plans for additional details).