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Earnings Per Share (Notes)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Earnings per share

The following table shows the calculation of basic and diluted earnings per share (in millions, except per share amounts):

			Three Months Ended
			March 31,
			2021						2020
Net income			$	48.7					$	43.8
Weighted-average number of common shares outstanding - basic			53.0						52.8
Dilutive effect of share equivalents			0.7						0.5
Number of common shares and share equivalents outstanding - diluted			53.7						53.3
Basic earnings per share			$	0.92					$	0.83
Diluted earnings per share			$	0.91					$	0.82
Number of anti-dilutive share equivalents			—						0.3

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- Definition

The entire disclosure for earnings per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-URI http://asc.fasb.org/topic&trid=2144383

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257

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