Summary Of Significant Accounting Policies (Software) (Details) (Software [Member], USD $) In Millions, unless otherwise specified	12 Months Ended			9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2012 Net Revenue [Member]	Dec. 31, 2012 Net Revenue [Member]	Sep. 30, 2012 Cost of Goods Sold [Member]	Dec. 31, 2012 Cost of Goods Sold [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Overstatement of revenue		$ 2.8	$ 1.4
Overstatement of costs		1.9	1.2
Out-of-period impact expense (revenue) adjustment	$ 1.1			$ (2.0)	$ (4.2)	$ 0.9	$ 3.1