Restructuring Activities (Narrative) (Details) (USD $) In Millions	3 Months Ended			9 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Restructuring Activities [Abstract]
Restructuring charges		$ 0.1	$ 2.4	$ 1.8	$ 3.8
Expected additional restructuring cost	0.3
Remaining liability for amounts expensed but not yet paid		$ 0.1		$ 0.1