Stockholders' Equity (Changes in Nonvested Stock Options) (Details) - $ / shares shares in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2016	Jun. 30, 2016
Stock-Based Compensation
Number of Options, beginning balance	2,086	1,724
Weighted-Average Exercise Price Per Share, beginning balance	$ 41.54	$ 40.54
Options granted, Number of options	0	1,055
Options granted, Weighted-Average Exercise Price Per Share		$ 40.26
Options vested, Number of options	(2)	(682)
Options vested, Weighted-Average Exercise Price Per Share	$ 40.63	$ 36.98
Options forfeited, Number of options	(4)	(17)
Options forfeited, Weighted-Average Exercise Price Per Share	$ 42.16	$ 42.81
Number of Options, ending balance	2,080	2,080
Weighted-Average Exercise Price Per Share, ending balance	$ 41.54	$ 41.54