Unaudited Condensed Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock (in dollars per share)	$ 0.1925	$ 0.1925	$ 0.1900	$ 0.1900	$ 0.1900	$ 0.1650