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Earnings Per Share and Equity (Tables)

9 Months Ended

Sep. 28, 2018

Earnings Per Share [Abstract]

Summary of Earnings Per Share

Calculations of net income per common share attributable to ON Semiconductor are as follows (in millions, except per share data):

	Quarters Ended								Nine Months Ended
	September 28, 2018				September 29, 2017				September 28, 2018				September 29, 2017
Net income attributable to ON Semiconductor Corporation	$	166.9			$	108.7			$	461.8			$	280.8
Basic weighted-average common shares outstanding	425.5				422.2				426.1				421.0
Dilutive effect of share-based awards	3.9				5.3				4.7				5.5
Dilutive effect of convertible notes	5.9				—				10.4				—
Diluted weighted-average common shares outstanding	435.3				427.5				441.2				426.5
Net income per common share attributable to ON Semiconductor Corporation:
Basic	$	0.39			$	0.26			$	1.08			$	0.67
Diluted	$	0.38			$	0.25			$	1.05			$	0.66

Schedule of Share Repurchase Program

Information relating to the Share Repurchase Program during the quarter and nine months ended September 28, 2018 is as follows (in millions, except per share data):

	Quarter Ended				Nine Months Ended
	September 28, 2018				September 28, 2018
Number of repurchased shares (1)	3.6				5.3
Aggregate purchase price	$	75.0			$	115.0
Weighted-average purchase price per share (2)	$	20.92			$	21.7

(1)    None of these shares had been reissued or retired as of September 28, 2018, but may be reissued or retired by

the Company at a later date.

(2)    Exclusive of fees, commissions and other expenses.

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