Condensed Consolidated Statements of Stockholders' (Deficit) Equity (Parenthetical) - $ / shares |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
Statement of Stockholders' Equity [Abstract] | ||||
Dividends declared (in dollars per share) | $ 1.14 | $ 1.04 | $ 2.21 | $ 2.08 |