Impairments, Restructuring Charges, and Other Items (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Summary of impairment, restructuring, and other charges
Severance, restructuring costs, and special termination benefits	$ 0.6	$ 0.3	$ 2.6	$ 5.6
Environmental reserve on held-for-sale building	0	0	0	0.1
Non cash postretirement benefits curtailment gain	0	0	(45.0)	0
Total impairments, restructuring charges, and other items	$ 0.6	$ 0.3	$ (42.4)	$ 5.7

The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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+ Details

- Definition

The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities.

+ References

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+ Details