Earnings per Share (EPS) (Details)	Dec. 31, 2020
2018 Performance-Based Grants
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Percentage of award issuable if current period end were end of contingency period	100.00%
2019 Performance-Based Grants
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Percentage of award issuable if current period end were end of contingency period	100.00%
2020 Performance-Based Grants
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Percentage of award issuable if current period end were end of contingency period	25.00%