Consolidated Statements of Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends per share (in dollars per share)	$ 1.34	$ 1.16	$ 2.50	$ 2.26