Net Income per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of Calculation of Basic and Diluted Net Income Per Share

The Company computed basic and diluted net income per share as follows (in millions, except per share amounts):

	Years Ended December 31,
	2020		2019		2018
Numerator:
Net income	$	257.8	$	345.0	$	566.9
Denominator:
Weighted-average shares used to compute basic net income per share	330.4		343.2		349.0
Dilutive effect of employee stock awards	4.8		5.0		5.4
Weighted-average shares used to compute diluted net income per share	335.2		348.2		354.4
Net income per share:
Basic	$	0.78	$	1.01	$	1.62
Diluted	$	0.77	$	0.99	$	1.60
Anti-dilutive shares	5.3		4.7		3.9