Background And Basis Of Presentation Effects of correction of error (Tables)

9 Months Ended

Sep. 30, 2011

Correction of other income (expense) [Abstract]

Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]

The following table presents the effects of this correction on the Company’s Consolidated Statements of Operations for all periods affected (in millions):



	For Quarter Ended						For Quarter Ended					For Six Months Ended
	April 1, 2011						July 1, 2011					July 1, 2011
	As reported			As revised			As reported		As revised			As reported		As revised
Other income (expenses), net:
Other	$	(0.2	)	$	(2.5	)	$	5.7	$	(1.0	)	$	5.5	$	(3.5	)
Net income attributable to ON Semiconductor Corporation	$	74.8		$	72.5		$	41.0	$	34.3		$	123.6	$	114.6

Net income per common share attributable to ON Semiconductor Corporation:
Basic	$	0.17		$	0.16		$	0.09	$	0.08		$	0.28	$	0.26
Diluted	$	0.16		$	0.16		$	0.09	$	0.07		$	0.27	$	0.25

- Definition

Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made.

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