Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Cash and Cash Equivalents
restricted cash	$ 16	$ 16
Accounts Receivable
net allowance for doubtful accounts	$ 16	$ 14
Common Stock
par value	$ 0.01	$ 0.01
shares authorized	300,000,000	300,000,000
shares issued	170,605,906	170,605,906
shares outstanding	82,556,847	82,556,847
Treasury stock, shares	88,049,059	88,049,059