CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
CONDENSED CONSOLIDATED BALANCE SHEETS
Receivables, allowances for losses and discounts (in dollars)	$ 42	$ 38	$ 38
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000	250,000,000
Common stock, shares issued	181,804,174	181,174,050	181,151,747
Treasury stock, shares	17,274,300	16,799,903	16,906,495