Condensed Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares		3 Months Ended		9 Months Ended
	Aug. 14, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per common share (in $ per share)	$ 0.67	$ 0.67	$ 0.55	$ 1.77	$ 1.45
Cash dividends declared per preferred share (in $ per share)	$ 1.8125	$ 1.81	$ 1.81	$ 5.44	$ 5.44