Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Allowances for Trade Receivables	$ 12.3	$ 13.6
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100.0	100.0
Common stock, shares issued	41.7	41.6