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Net Earnings Per Share

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Net Earnings Per Share

Net Earnings Per Share

The calculation of net earnings per share - basic and net earnings per share - diluted were as follows:

Year Ended December 31	2017			2016			2015
Net earnings available to common shareholders:		$545.4			$443.7			$419.2
Weighted-average common shares outstanding (in millions):
Weighted-average common shares outstanding - basic	67.1			70.1			76.8
Effect of dilutive securities - stock options	0.2			0.2			0.5
Effect of other share-based awards	0.6			0.5			0.4
Weighted-average common shares outstanding - diluted	67.9			70.8			77.7
Net earnings per share - basic		$8.13			$6.33			$5.46
Net earnings per share - diluted		$8.04			$6.27			$5.40

There were no share-based awards excluded from the calculation of net earnings per share - diluted for the year ended December 31, 2017, however there were certain share-based awards excluded for the year ended December 31, 2016 and 2015, respectively, as the exercise prices for these awards were greater than the average market price of the common shares during the period. The number, exercise prices and weighted-average remaining life of these antidilutive awards were as follows:

	2017			2016		2015
Shares (in thousands)	—			20		20
Exercise price		$—		$93		$93
Weighted-average remaining life	0.0 years			0.4 years		1.4 years

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- References

No definition available.

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- Definition

The entire disclosure for earnings per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1278-109256

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.21)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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