Consolidated Statements of Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]
Dividends per share (in dollars per share)	$ 1.50	$ 1.34	$ 4.34	$ 3.84