Quarterly report pursuant to Section 13 or 15(d)

Reclassifications Out Of Accumulated Other Comprehensive Income (Detail)

v2.4.0.8
Reclassifications Out Of Accumulated Other Comprehensive Income (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Amortization of pension and other postretirement plan items:        
Total net periodic benefit cost, net of tax $ 3.1 $ 3.1 $ 8.4 $ 9.3
Reclassification out of Accumulated Other Comprehensive Income [Member]
        
Amortization of pension and other postretirement plan items:        
Prior service cost     (0.6) [1],[2]  
Recognized actuarial loss     (17.1) [1],[2]  
Total net periodic benefit cost, before tax     (17.7) [1]  
Total net periodic benefit cost, tax benefit     6.7 [1]  
Total net periodic benefit cost, net of tax     $ (11.0) [1]  
[1] Amounts in parentheses indicate expense recognized in the Consolidated Statements of Income.
[2] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (See Note 8 Benefit Plans for additional details).