|
Debt Outstanding (Detail) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Debt Outstanding [Line Items] | ||
| Total debt | $ 955.8 | $ 999.2 |
| Less short-term debt and current maturities | (16.9) | (47.2) |
| Less unamortized discounts | 1.7 | (1.8) |
| Plus fair value adjustments | 14.2 | 15.8 |
| Long-term debt | 951.4 | 966.0 |
|
Notes, 7.34%, due in installments through May 2014 [Member]
|
||
| Debt Outstanding [Line Items] | ||
| Total debt | 30.0 | 45.0 |
|
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 |
|
Debentures, 6.90%, Due July 2028 [Member]
|
||
| Debt Outstanding [Line Items] | ||
| Total debt | 125.0 | 12.5 |
|
Notes, 7.00%, Due July 2037 [Member]
|
||
| Debt Outstanding [Line Items] | ||
| Total debt | 250.0 | 250.0 |
|
Commercial Paper [Member]
|
||
| Debt Outstanding [Line Items] | ||
| Total debt | 0 | 30.0 |
|
Capitalized Lease Obligation [Member]
|
||
| Debt Outstanding [Line Items] | ||
| Total debt | 2.6 | 1.1 |
|
Other [Member]
|
||
| Debt Outstanding [Line Items] | ||
| Total debt | $ 0.7 | $ 0.6 |