Consolidated Balance Sheets (Parenthetical) - $ / shares |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Common stock, par value per share (in USD per share) | $ 0.01 | $ 0.01 |
| Common stock, shares authorized (in shares) | 750,000,000 | 750,000,000 |
| Common stock, shares issued (in shares) | 483,566,341 | 441,819,964 |
| Common stock, shares outstanding (in shares) | 483,566,341 | 441,819,964 |