Net Investment Hedge	3 Months Ended
	Mar. 30, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net Investment Hedge	Net Investment HedgeAll of our euro denominated notes were issued by Belden Inc., a USD functional currency entity. As of March 30, 2025, €567.8 million of our outstanding foreign denominated debt is designated as a net investment hedge on the foreign currency risk of our net investment in our euro foreign operations. The objective of the hedge is to protect the net investment in the foreign operation against adverse changes in the euro exchange rate. The transaction gain or loss is reported in the translation adjustment section of other comprehensive income. For the three months ended March 30, 2025 and March 31, 2024, the transaction gain (loss) associated with the net investment hedge reported in other comprehensive income was $(24.9) million and $12.7 million, respectively.