The computation of basic and diluted net income per share was as follows (in millions, except per share data):


	Three Months Ended				Six Months Ended
	December				December
	2022		2021		2022		2021
Numerator:
Net income	$	22.0	$	69.5	$	86.6	$	109.7
Denominator:
Shares, basic		39.8		39.4		39.8		38.5
Effect of dilutive share-based awards and convertible notes		0.4		1.3		0.7		2.2
Shares, diluted		40.2		40.7		40.5		40.7
Net income per share:
Basic	$	0.55	$	1.76	$	2.18	$	2.85
Diluted	$	0.55	$	1.71	$	2.14	$	2.70

Our basic net income per share amounts for each period presented have been computed using the weighted average number of shares of common stock, $0.001 par value, or the common stock, outstanding over the period measured. Our diluted net income per share amounts for each period presented include the weighted average effect of potentially dilutive shares. We use the "treasury stock" method to determine the dilutive effect of our stock options, restricted stock units, or RSUs, market stock units, or MSUs, performance stock units, or PSUs, and our convertible notes, which were settled in August 2021.

Dilutive net income per share amounts do not include the potential weighted average effect of 1,092,428 and 12,987 shares of common stock related to certain share-based awards that were outstanding during the three months ended December 2022 and December 2021, respectively, and 640,047 and 10,209 shares of common stock related to certain share-based awards that were outstanding during six months ended December 2022 and December 2021, respectively. These share-based awards were not included in the computation of diluted net income per share because their effect would have been antidilutive.