Summary of Significant Accounting Policies (Tables)

3 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Restrictions on Cash and Cash Equivalents

The following table provides a reconciliation of the total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Balance Sheets to the corresponding amounts reported on the Condensed Consolidated Statements of Cash Flows:

	Cash, Cash Equivalents and Restricted Cash
	December 31, 2018		December 31, 2017		September 30, 2018		September 30, 2017
Cash and cash equivalents	$	477.6	$	446.4	$	452.6	$	558.4
Restricted cash	17.4		19.8		9.6		10.3
Cash, cash equivalents and restricted cash	$	495.0	$	466.2	$	462.2	$	568.7

Schedule of Cash and Cash Equivalents

The following table provides a reconciliation of the total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Balance Sheets to the corresponding amounts reported on the Condensed Consolidated Statements of Cash Flows:

	Cash, Cash Equivalents and Restricted Cash
	December 31, 2018		December 31, 2017		September 30, 2018		September 30, 2017
Cash and cash equivalents	$	477.6	$	446.4	$	452.6	$	558.4
Restricted cash	17.4		19.8		9.6		10.3
Cash, cash equivalents and restricted cash	$	495.0	$	466.2	$	462.2	$	568.7

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,
	2018	2017
Denominator (thousands of shares):
Weighted-average common shares outstanding — basic	174,413	173,670
Incremental shares issuable for stock options and awards (a)	3,153	3,278
Weighted-average common shares outstanding — diluted	177,566	176,948

(a) For the three months ended December 31, 2018 and 2017, there were 30 and 146 shares, respectively, associated with outstanding stock option awards that were excluded from the computation of diluted earnings per share above because their effect was antidilutive.