Net Investment Hedge	12 Months Ended
	Dec. 31, 2024
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 December 31, 2024, €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 years ended December 31, 2024, 2023, and 2022, the transaction gain (loss) associated with the net investment hedge reported in other comprehensive income was $40.0 million, $(21.5) million, and $41.9 million, respectively.