Quarterly report pursuant to Section 13 or 15(d)

Debt Outstanding (Detail)

v2.4.0.6
Debt Outstanding (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Debt Outstanding [Line Items]    
Total debt $ 1,613.9 $ 1,720.4
Less short-term debt and current maturities (176.7) (283.3)
Less unamortized discounts (2.3) (2.3)
Plus fair value adjustments 10.7 12.6
Total long-term debt, net 1,445.6 1,447.4
Commercial Paper [Member]
   
Debt Outstanding [Line Items]    
Total debt 160.0 265.0
Notes, 7.34%, due in installments through May 2014 [Member]
   
Debt Outstanding [Line Items]    
Total debt 30.0 30.0
Notes, 4.45%, due December 2014 [Member]
   
Debt Outstanding [Line Items]    
Total debt 275.0 275.0
Notes, 6.30%, due July 2017 [Member]
   
Debt Outstanding [Line Items]    
Total debt 272.5 272.5
Notes, 3.30%, due Dec 2022 [Member]
   
Debt Outstanding [Line Items]    
Total debt 500.0 500.0
Debentures, 6.90%, Due July 2028 [Member]
   
Debt Outstanding [Line Items]    
Total debt 125.0 125.0
Notes, 7.00%, Due July 2037 [Member]
   
Debt Outstanding [Line Items]    
Total debt 250.0 250.0
Capitalized Lease Obligation [Member]
   
Debt Outstanding [Line Items]    
Total debt 0 2.2
Other [Member]
   
Debt Outstanding [Line Items]    
Total debt $ 1.4 $ 0.7