Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Summary of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Settlement loss	$ (1,000)		$ (1,000)
Total before tax	119,791	$ 53,763	245,439	$ 144,808
Income tax expense	(16,104)	(9,799)	(39,014)	(26,433)
Net income attributable to Belden stockholders	$ 98,294	$ 41,264	192,696	$ 113,694
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Settlement loss			954
Reclassification out of Accumulated Other Comprehensive Income | Pension and Other  Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax			1,698
Income tax expense			(436)
Net income attributable to Belden stockholders			1,262
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating expense (income)			612
Reclassification out of Accumulated Other Comprehensive Income | Prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating expense (income)			132
Reclassification out of Accumulated Other Comprehensive Income | Foreign Currency Translation Component | Tripwire
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating expense (income)			$ 3,000