CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Apr. 01, 2022
Income Statement [Abstract]
Revenue	$ 1,959.7	$ 1,945.0
Cost of revenue	1,042.2	983.7
Gross profit	917.5	961.3
Operating expenses:
Research and development	138.4	156.8
Selling and marketing	71.8	71.1
General and administrative	75.9	77.9
Amortization of acquisition-related intangible assets	15.0	21.3
Restructuring, asset impairments and other charges, net	51.5	(13.0)
Total operating expenses	352.6	314.1
Operating income	564.9	647.2
Other income (expense), net:
Interest expense	(26.4)	(21.6)
Interest income	17.1	0.4
Loss on debt prepayment	(13.3)	0.0
Loss on divestiture of business	(1.1)	0.0
Other income	4.7	2.1
Other income (expense), net	(19.0)	(19.1)
Income before income taxes	545.9	628.1
Income tax provision	(83.7)	(97.1)
Net income	462.2	531.0
Less: Net income attributable to non-controlling interest	(0.5)	(0.8)
Net income attributable to ON Semiconductor Corporation	461.7	530.2
Net income for diluted earnings per share of common stock	$ 462.1	$ 530.7
Net income per share of common stock attributable to ON Semiconductor Corporation:
Basic (in dollars per share)	$ 1.07	$ 1.22
Diluted (in dollars per share)	$ 1.03	$ 1.18
Weighted-average shares of common stock outstanding:
Basic (in shares)	431.9	433.3
Diluted (in shares)	448.5	448.9
Comprehensive income (loss), net of tax:
Net income	$ 462.2	$ 531.0
Foreign currency translation adjustments	0.3	(2.4)
Effects of cash flow hedges and other adjustments	(6.7)	16.6
Other comprehensive income (loss), net of tax	(6.4)	14.2
Comprehensive income	455.8	545.2
Comprehensive income attributable to non-controlling interest	(0.5)	(0.8)
Comprehensive income attributable to ON Semiconductor Corporation	$ 455.3	$ 544.4