Cash Dividends (Details) - $ / shares				3 Months Ended		9 Months Ended
	Jun. 03, 2015	Jun. 01, 2015	Mar. 04, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Cash Dividends
Cash dividends declared, per share (in dollars per share)	$ 0.6875		$ 0.6875	$ 0.6875	$ 0.6875	$ 2.0625	$ 1.9375
Cash dividend paid, per share (in dollars per share)		$ 0.6875