Cash Dividends (Details) - $ / shares				3 Months Ended		6 Months Ended
	Mar. 02, 2016	Mar. 01, 2016	Dec. 01, 2015	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Cash Dividends
Cash dividends declared, per share (in dollars per share)	$ 0.6875	$ 0.6875		$ 0.6875	$ 0.6875	$ 1.375	$ 1.3750
Cash dividend paid, per share (in dollars per share)			$ 0.6875