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
	Apr. 03, 2022	Apr. 04, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ 53,918	$ 36,121
Income tax expense	(9,822)	(7,056)
Net income attributable to Belden stockholders	35,841	$ 28,666
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	263
Income tax expense	(70)
Net income attributable to Belden stockholders	193
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating expense (income)	216
Reclassification out of Accumulated Other Comprehensive Income | Prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating expense (income)	47
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