Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.90	$ 0.90	$ 0.90	$ 0.85	$ 0.85	$ 0.75