Summary of Significant Accounting Policies (Tables)

6 Months Ended

Mar. 31, 2016

Accounting Policies [Abstract]

Shares Used in Computing Basic and Diluted Earnings Per Share

Shares used in computing basic and diluted earnings per share are as follows:

	Three Months Ended March 31,		Six Months Ended March 31,
	2016	2015	2016	2015
Denominator (thousands of shares):
Weighted-average common shares outstanding - basic	172,619	173,154	172,733	173,055
Incremental shares issuable for stock options and awards	2,226	2,474	2,220	2,660
Weighted-average common shares outstanding - diluted	174,845	175,628	174,953	175,715