Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Jun. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets
Receivables, allowances	$ 6.9	$ 8.3
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	4,200,000,000	4,200,000,000
Common Stock, shares issued	204,900,000	204,800,000