Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data	Jun. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets
Accounts receivable, allowances	$ 73.3	$ 64.7
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5.0	5.0
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	300	150
Common stock, shares issued	92.7	92.7
Treasury stock, shares	1.2	0.9