Subsequent Events Narrative Data (Details) - $ / shares		3 Months Ended	12 Months Ended
	Jan. 20, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Dividends per common share (in usd per share)		$ 0.32	$ 1.28	$ 1.24
Subsequent Event
Subsequent Event [Line Items]
Dividends per common share (in usd per share)	$ 0.33
Increase in cash dividend, percentage	3.10%