Consolidated Statements of Changes In Shareholders' Equity (Unaudited) Consolidated Statements of Changes in Shareholders's Equity (Unaudited) - Parenthetical - $ / shares	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividend on common stock (in dollars per share)	$ 340.00	$ 340.00	$ 330.00	$ 330.00	$ 300.00	$ 300.00