Earnings Per Share and Equity - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 04, 2026	Mar. 29, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Feb. 08, 2023
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive shares (in shares)			1,400,000	500,000	100,000
Share repurchases			$ 1,375,000,000	$ 650,000,000.0	$ 564,000,000.0
Repurchase of common stock (in shares)			27,900,000	9,100,000	7,600,000
Payments of tax withholding for RSUs			$ 29,100,000	$ 50,800,000	$ 67,100,000
Noncontrolling interest balance			18,600,000	18,100,000
Net Income (loss) attributable to noncontrolling interest			2,600,000	1,800,000	1,900,000
Dividend to non-controlling shareholder			2,100,000	$ 1,700,000	$ 2,400,000
Leshan
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Noncontrolling interest balance			$ 18,600,000
Leshan \| Leshan
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Ownership percentage			80.00%
Treasury Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Repurchase of common stock (in shares)			27,926,011	9,128,271	7,566,628
Payments of tax withholding for RSUs			$ 29,100,000	$ 50,800,000	$ 67,100,000
Payment of tax withholding for RSUs (in shares)			595,259	676,539	805,107
Non-Controlling Interest
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dividend to non-controlling shareholder			$ 2,100,000	$ 1,700,000	$ 2,400,000
2023 Program
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Authorized repurchases						$ 3,000,000,000
Share repurchases			1,375,000,000	$ 650,000,000	$ 564,000,000
New Share Repurchase Program
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Authorized repurchases			$ 6,000,000,000
New Share Repurchase Program \| Subsequent Event
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Share repurchases	$ 175,600,000
Repurchase of common stock (in shares)	2,900,000
0.50% Notes Warrants
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Exercise price, warrants (in dollars per share)				$ 156.78	$ 156.78
0% Notes Warrants
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Exercise price, warrants (in dollars per share)				$ 74.34	$ 74.34
Note Warrant
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Exercise price, warrants (in dollars per share)		$ 30.70
Warrants exercised (in shares)		6,700,000
Shares issued for warrant settlement (in shares)		4,000,000
0.50% Notes \| Convertible Debt
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Debt instrument, interest rate			0.50%	0.50%	0.50%
Conversion price per share (in dollars per share)			$ 103.87
0.50% Notes \| Convertible Debt \| 0.50% Notes Warrants
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares issued for warrant settlement (in shares)			14,400,000
0% Notes \| Convertible Debt
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Debt instrument, interest rate			0.00%	0.00%	0.00%
Conversion price per share (in dollars per share)			$ 52.97
0% Notes \| Convertible Debt \| 0% Notes Warrants
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares issued for warrant settlement (in shares)			15,200,000
1.625% Notes \| Convertible Debt
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Debt instrument, interest rate		1.625%	1.625%	1.625%	1.625%

ON SEMICONDUCTOR CORP 10-K