Summary of Significant Accounting Policies (Tables)

3 Months Ended

Dec. 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 December 31,
	2016		2015
Denominator (thousands of shares):
Weighted-average common shares outstanding — basic	173,512		172,862
Incremental shares issuable for stock options and awards	3,472	(a)	2,356
Weighted-average common shares outstanding — diluted	176,984		175,218

(a) See “Adoption of New Accounting Standard - Employee Share-based Payments” below for the impact on the calculation of diluted shares resulting from the adoption of new accounting guidance regarding share-based payments.