Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The table below presents the computation of basic and diluted EPS:

	Year Ended
	December 31, 2020		December 31, 2019		December 31, 2018
Numerator:
Net income	$	33.3	$	217.6	$	230.7
Denominator:
Weighted-average common shares outstanding used in basic EPS	159.6		136.2		127.9
Incremental common shares from:
Assumed exercise of dilutive options and vesting of dilutive restricted stock units	2.2		0.2		—
Assumed conversion of the Notes	2.3		—		—
Weighted average common shares outstanding used in diluted EPS	164.1		136.4		127.9
Earnings per share:
Basic	$	0.21	$	1.60	$	1.80
Diluted	$	0.20	$	1.60	$	1.80

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table presents the number of outstanding securities not included in the computation of diluted income per share, because their effect was anti-dilutive (in millions):

	Year Ended
	December 31, 2020	December 31, 2019	December 31, 2018
Stock-based awards	4.1	0.3	—
Total	4.1	0.3	—