Discontinued Operations Receivable and Liability - Cash Activity Related to Discontinued Operations Assets and Liabilties (Details Textual) (USD $) In Millions	3 Months Ended			9 Months Ended	12 Months Ended
	Dec. 31, 2008	Sep. 30, 2008	Dec. 31, 2007	Sep. 30, 2011	Dec. 31, 2009	Apr. 05, 2011	Dec. 31, 2010
Discontinued Operations Receivable and Liability (Textual)
Potential payment to be received under third party bankruptcy settlement			$ 138
Actual payment received under third party bankruptcy settlement	138
Potential additional settlement payment in future years			20
Interest received related to third party bankruptcy settlement payment	3
Initial payment to settlement trust required under potential third party bankruptcy settlement			248.5
Tax expense (benefit) related to Income from discontinued operations		9.4		105.6	16.2
Estimated undiscounted liability for asbestos claims related to discontinued operations	815.1				784.5	736.3	747.1
Access to Abex insurance policies with remaining limits, minimum						660
Estimated insurance recoveries for asbestos claims related to discontinued operations	192.3				179.3	151.9	163.6
Total amount of payments due under settlement agreement						307.5
Amount of payment due at closing under settlement agreement						250.0
Remaining amount of payments due under settlement agreement						49.6
Payment due under settlement agreement, 2012				9.1
Payment due under settlement agreement, 2013				17.0
Payment due under settlement agreement, 2014				11.75
Payment due under settlement agreement, 2015				11.75
Income related to discontinued operations, net of income taxes		16.6		190.3	25.5
Receivable for Non-Abex asbestos related insurance settlements				$ 8.9