Stock-based Compensation (Tables)

3 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Options Outstanding and Activity During the Period

The following table summarizes all stock option activity for the three months ended December 31, 2021 (in millions, except per share amounts and time periods):

	Options Outstanding			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value1
Balance as of September 30, 2021		1.8		$	34.88		5.8	$	24.9
Exercised		(0.2	)		32.14
Canceled/Forfeited		(0.0	)		28.85
Expired		(0.0	)		18.72
Balance as of December 31, 2021		1.6		$	35.25		5.8	$	36.2
Vested and expected to vest after December 31, 2021		1.6		$	35.27		5.7	$	35.8
Exercisable as of December 31, 2021		1.3		$	35.77		5.1	$	28.3

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1.Aggregate intrinsic value represents the difference between the closing fair value of the underlying common stock and the exercise price of outstanding, in-the-money options on the date of measurement.

Stock Option Grants, Vesting, and Exercises

The following table summarizes additional information on stock options (in millions, except per share amounts):

	Three Months Ended December 31,
	2021		2020
Weighted-average fair value per share of stock options granted	$	—	$	15.62
Total grant date fair value of stock options vested	$	3.7	$	4.1
Total intrinsic value of stock options exercised	$	4.1	$	2.6

Restricted Shares and Units Outstanding and Activity During the Period

The following table summarizes all restricted stock unit activity for the three months ended December 31, 2021 (in millions, except per share amounts):

	RSUs Outstanding			Weighted-Average Grant Date Fair Value
Balance as of September 30, 2021		1.0		$	33.76
Granted		0.0			52.43
Released		(0.2	)		28.97
Canceled/Forfeited		(0.1	)		28.94
Balance as of December 31, 2021		0.7		$	35.99
Vested and expected to vest after December 31, 20211		0.9		$	35.85

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1.As of December 31, 2021, outstanding PSUs were expected to vest at greater than 100% of their original grant amount.

Schedule Of Restricted Stock Units Additional Information

The following table summarizes additional information on RSUs (in millions, except per share amounts):

	Three Months Ended December 31,
	2021		2020
Weighted-average fair value per share of RSUs granted	$	52.43	$	36.07
Total grant date fair value of RSUs vested	$	7.0	$	11.3
Total intrinsic value of RSUs released	$	14.5	$	9.5