Changes in Equity - Parenthetical (Details) - $ / shares |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
| Changes in Equity [Abstract] | ||||
| Dividends paid, per share of common stock (dollars per share) | $ 0.43 | $ 0.42 | $ 1.29 | $ 1.26 |
| Dividends payable, per share of common stock (dollars per share) | $ 0.46 | $ 0.46 | ||