Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Dividends declared, common stock (dollars per share)	$ 1.68	$ 1.5	$ 1.3
Dividends declared, preferred stock (dollars per share)	$ 5,500	$ 5,500	$ 65