Discontinued Operations Receivable and Liability - Cash Activity Related to Discontinued Operations Assets and Liabilties (Details Textual) (USD $) In Millions	3 Months Ended				6 Months Ended	12 Months Ended
	Mar. 31, 2011	Dec. 31, 2008	Sep. 30, 2008	Dec. 31, 2007	Jun. 30, 2011	Dec. 31, 2009	Apr. 05, 2011	Dec. 31, 2010
Discontinued Operations Receivable and Liability (Textuals)
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 pending and future indemnity and defense costs related to asbestos claims in future years	736.3
Estimated undiscounted liability for asbestos claims related to discontinued operations		815.1				784.5		747.1
Access to Abex insurance policies with remaining limits, minimum	660
Estimated insurance recoveries for asbestos claims related to discontinued operations	151.9	192.3				179.3		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					$ 10