|
Goderich Tornado (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | 12 Months Ended | 14 Months Ended | ||
|---|---|---|---|---|---|---|
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Dec. 31, 2011
|
Sep. 30, 2012
|
|
| Product cost: | ||||||
| Property, plant and equipment impairment charges | $ 0 | $ 4.1 | $ 0 | $ 4.1 | ||
| Site clean-up and restoration costs | 1.7 | 5.3 | 8.7 | 5.3 | ||
| Estimated insurance recoveries recognized | (1.7) | (9.4) | (8.7) | (9.4) | ||
| Net impact on product cost excluding business interruption | 0 | 0 | 0 | 0 | ||
| Total insurance advances | 25 | 50 | ||||
| Deferred revenue | 16.3 | |||||
| Insurance advances for operating purposes, Goderich tornado | 16.3 | 0 | ||||
| Total amount recorded in deferred revenue since the tornado | 26.3 | |||||
| Total insurance advances received and recorded as reduction to salt product costs | 23.2 | |||||
| Impairment charges related to damaged property, plant, and equipment | 4.8 | |||||
| Estimated recoverable business interruption losses | $ 1 | $ 18 | $ 34 | |||