Consolidated Statements of Changes in Total Equity (Parenthetical) - $ / shares |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Consolidated Statements of Changes in Total Equity | |||||||||||
| Dividends declared per common share | $ 0.3 | $ 0.3 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.2 | $ 0.2 | $ 1.1 | $ 0.9 | $ 0.7 |