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Earnings Per Share

12 Months Ended

Dec. 31, 2022

Earnings per share were calculated as follows:


	Year Ended December 31,
(in millions, except per share data)	2022		2021		2020
Net income - basic and diluted	$	154.5	$	89.6	$	407.3
Weighted-average common shares outstanding:
Basic	95.8		94.6		93.1
Effect of dilutive securities	3.1		3.3		4.7
Diluted	98.9		97.9		97.8
Earnings per share:
Basic	$	1.61	$	0.95	$	4.38
Diluted	$	1.56	$	0.92	$	4.16

Shares which have been excluded from diluted per share amounts because their effect would have been anti-dilutive were 4.6 million for 2022, 4.1 million for 2021 and 2.5 million for 2020.