|
Debt Outstanding (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2012
Notes, 7.34%, due in installments through May 2014
|
Dec. 31, 2011
Notes, 7.34%, due in installments through May 2014
|
May 31, 2007
Notes, 7.34%, due in installments through May 2014
|
Dec. 31, 2012
Notes, 4.45%, due December 2014
|
Dec. 31, 2011
Notes, 4.45%, due December 2014
|
Nov. 04, 2009
Notes, 4.45%, due December 2014
|
Dec. 31, 2012
Notes, 6.30%, due July 2017
|
Dec. 31, 2011
Notes, 6.30%, due July 2017
|
Jun. 28, 2007
Notes, 6.30%, due July 2017
|
Dec. 31, 2012
Notes, 3.30%, due Dec 2022
|
Dec. 17, 2012
Notes, 3.30%, due Dec 2022
|
Dec. 31, 2011
Notes, 3.30%, due Dec 2022
|
Dec. 31, 2012
Debentures, 6.90%, due July 2028
|
Dec. 31, 2011
Debentures, 6.90%, due July 2028
|
Dec. 31, 2010
Debentures, 6.90%, due July 2028
|
Dec. 31, 2012
Notes, 7.00%, due July 2037
|
Dec. 31, 2011
Notes, 7.00%, due July 2037
|
Jun. 28, 2007
Notes, 7.00%, due July 2037
|
Dec. 31, 2012
Commercial paper
|
Dec. 31, 2011
Commercial paper
|
Dec. 31, 2012
Capitalized lease obligation
|
Dec. 31, 2011
Capitalized lease obligation
|
Dec. 31, 2012
Other
|
Dec. 31, 2011
Other
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Debt Instrument [Line Items] | ||||||||||||||||||||||||||
| Total debt | $ 1,720.40 | $ 999.20 | $ 30.00 | $ 45.00 | $ 75.00 | $ 275.00 | $ 275.00 | $ 275.00 | $ 272.50 | $ 272.50 | $ 300.00 | $ 500.00 | $ 500.00 | $ 0 | $ 125.00 | $ 125.00 | $ 125.00 | $ 250.00 | $ 250.00 | $ 250.00 | $ 265.00 | $ 30.00 | $ 2.20 | $ 1.10 | $ 0.70 | $ 0.60 |
| Less short-term debt and current maturities | (283.3) | (47.2) | ||||||||||||||||||||||||
| Less unamortized discounts | (2.3) | (1.8) | ||||||||||||||||||||||||
| Plus fair value adjustments | 12.6 | 15.8 | 0.4 | 1.0 | 12.2 | 14.8 | ||||||||||||||||||||
| Total long-term debt, net of discount | $ 1,447.4 | $ 966.0 |