Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Receivables, allowance for doubtful accounts | $ 69 | $ 79 |
| Preferred stock, par (in USD per share) | $ 1 | $ 1 |
| Preferred stock, shares authorized (in shares) | 10,000,000 | 10,000,000 |
| Preferred stock, issued (in shares) | 0 | 0 |
| Common stock, par (in USD per share) | $ 0.1667 | $ 0.1667 |
| Common stock, shares authorized (in shares) | 300,000,000 | 300,000,000 |
| Common stock, shares issued (in shares) | 198,629,992 | 198,594,841 |
| Treasury stock (in shares) | 66,524,771 | 63,028,169 |