CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Millions |
Sep. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Allowance for doubtful accounts | $ 9 | $ 10 |
| Preferred stock, par value | $ 0.01 | $ 0.01 |
| Preferred stock, authorized | 10,000,000 | 10,000,000 |
| Preferred stock, issued | 0 | 0 |
| Preferred stock, outstanding | 0 | 0 |
| Common stock, par value | $ 0.01 | $ 0.01 |
| Common stock, authorized | 400,000,000 | 400,000,000 |
| Common stock, issued | 135,500,000 | 135,500,000 |
| Common stock, outstanding | 116,700,000 | 117,800,000 |
| Treasury stock shares | 18,800,000 | 17,700,000 |