CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
CONDENSED CONSOLIDATED BALANCE SHEETS
Receivables, allowances for losses and discounts (in dollars)	$ 41	$ 40	$ 32
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	181,192,253	180,808,992	180,746,135
Treasury stock, shares	16,991,597	17,093,509	17,195,395