Earnings (Loss) Per Share (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Basic and Diluted Earnings (Loss) Per Share

The following table presents the calculation of basic and diluted earnings (loss) per share:

	Three Months Ended
	March 31,
	2021		2020
Net income (loss) from continuing operations	$	239.5	$	(232.2)
Loss from discontinued operations, net of income taxes	(0.1)		(0.1)
Net income (loss)	$	239.4	$	(232.3)
Basic weighted average common shares outstanding	83.1		90.0
Dilutive effect of stock options and unvested RSUs	0.8		—
Diluted weighted average common shares outstanding	83.9		90.0
Basic earnings (loss) per share amounts(1):
Continuing operations	$	2.88	$	(2.58)
Discontinued operations	$	—	$	—
Net income (loss)	$	2.88	$	(2.58)
Diluted earnings (loss) per share amounts(1):
Continuing operations	$	2.85	$	(2.58)
Discontinued operations	$	—	$	—
Net income (loss)	$	2.85	$	(2.58)
(1) Earnings (loss) per share amounts are calculated discretely and, therefore, may not add up to the total due to rounding.

Anti-Dilutive Equity Instruments Excluded From The Computation Of Diluted EPS

A summary of anti-dilutive equity instruments excluded from the computation of diluted earnings (loss) per share is as follows:

	Three Months Ended
	March 31,
	2021	2020
Anti-dilutive equity instruments excluded from the computation of diluted earnings (loss) per share	—	3.0