Shareholders' Equity - Cash Dividends Declared Per Common Share (Details) - $ / shares	3 Months Ended			12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Shareholders Equity [Abstract]
Quarterly dividend declared and paid per common share	$ 0.63	$ 0.62	$ 0.61	$ 2.52	$ 2.48	$ 2.44