NET INCOME PER SHARE

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

NET INCOME PER SHARE

NET INCOME PER SHARE

The following table sets forth the calculation of basic and diluted net income per share (in millions, except per share data):

	Year Ended December 31,
	2023		2022		2021
Numerator:
Net income	$	374.7	$	369.5	$	292.6
Denominator:
Denominator for basic net income per share — weighted-average outstanding shares	405.3		396.3		392.2
Effect of dilutive securities:
Stock options, restricted stock awards and restricted stock units	1.6		1.5		2.0
Denominator for diluted net income per share — weighted-average outstanding shares	406.9		397.8		394.2
Net income per share — basic	$	0.92	$	0.93	$	0.75
Net income per share — diluted	$	0.92	$	0.93	$	0.74

The following table summarizes the shares underlying the unvested performance-based restricted stock and anti-dilutive securities excluded from the basic and diluted earnings per share calculations (in millions):

	Year Ended December 31,
	2023	2022	2021
Performance-based restricted stock awards	0.2	0.4	0.4
Anti-dilutive securities	0.7	1.0	0.4