Equity - Cash Dividends (Details) - $ / shares |
3 Months Ended | 12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Oct. 30, 2020 |
Sep. 11, 2020 |
Jun. 17, 2020 |
Feb. 20, 2020 |
Nov. 01, 2019 |
Sep. 06, 2019 |
Jun. 20, 2019 |
Feb. 21, 2019 |
Nov. 02, 2018 |
Sep. 07, 2018 |
Jun. 14, 2018 |
Feb. 15, 2018 |
Dec. 31, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Equity [Abstract] | ||||||||||||||||
| Cash dividends declared per common share (in dollars per share) | $ 1.30 | $ 1.18 | $ 1.18 | $ 1.18 | $ 1.18 | $ 1.07 | $ 1.07 | $ 1.07 | $ 1.07 | $ 0.96 | $ 0.96 | $ 0.96 | $ 1.30 | $ 4.84 | $ 4.39 | $ 3.95 |