Earnings per Share

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Earnings Per Share

Diluted EPS is based on the weighted average outstanding common shares during each period, including common stock equivalents. Basic EPS is based on the weighted average outstanding common shares during the period.

The following table presents the calculation of basic and diluted EPS: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	(in millions, except per share amounts)
Weighted average shares - basic	102.7		99.8		101.8		100.6
Dilutive effect of stock awards	0.7		0.2		0.6		0.2
Weighted average shares - diluted	103.4		100.0		102.4		100.8
Net income	$	223.8	$	93.3	$	416.3	$	177.2
Earnings per share - basic	2.18		0.93		4.09		1.76
Earnings per share - diluted	2.17		0.93		4.07		1.76

The Company had no anti-dilutive stock options outstanding at each of the periods ended June 30, 2021 and 2020.