Commitments and Contingencies (Details)																6 Months Ended
	Jun. 28, 2021 patent	Jun. 21, 2021 patent	Jun. 11, 2021 patent	Jun. 09, 2021 case	Jun. 08, 2021 case	Apr. 01, 2021 case	Mar. 19, 2021 case	Jan. 13, 2021 patent	Oct. 19, 2020 case	Sep. 09, 2020 patent	Jun. 21, 2019 patent	Sep. 14, 2018 patent	Jul. 18, 2018 patent	Jul. 14, 2017 patent	Apr. 19, 2017 patent	Jun. 27, 2021 USD ($) claim patent
Loss Contingencies [Line Items]
Number of days for non-cancellation of purchase obligations prior to expected shipment date																30 days
Non-cancelable purchase commitments with suppliers | $																$ 133,200,000
Long-term, non-cancellable purchase commitments | $																15,800,000
Liabilities recorded for director and officer indemnification agreements | $																0
Liabilities recorded for customers, distributors, and resellers indemnification agreements | $																$ 0
Number of existing cases and proceedings that the Company currently believes are liking to have a material adverse effect on its financial position | claim | claim																0
The future length the Company currently considered regarding existing cases and proceedings that are likely to have a material adverse effect on it (in months)																12 months
Vivato v. NETGEAR
Loss Contingencies [Line Items]
Number of patents under litigation															3
Hera Wireless v. NETGEAR
Loss Contingencies [Line Items]
Number of patents accused of infringing upon												6	3	3		9
Number of patents claims canceled																8
Aegis 11 S.A. v. NETGEAR [Member]
Loss Contingencies [Line Items]
Number of patents accused of infringing upon											3
Number of patents										3
Number of patents dismissed										1
Beijing Tianxing Ebel Information Consulting Co., Ltd v. NETGEAR Inc.
Loss Contingencies [Line Items]
Number of complaints filed against company | case									2
Number of patents submitted for invalidity challenges at CNIPA			3
WSOU v. NETGEAR Inc
Loss Contingencies [Line Items]
Number of patents								3
Shenzhen Yuanyu and Gaoping Yaoyi v. NETGEAR Beijing
Loss Contingencies [Line Items]
Number of patent infringement cases | case							7
Shenzhen Yuanyu and Gaoping Yaoyi v. NETGEAR Beijing | Subsequent Event
Loss Contingencies [Line Items]
Number of patents submitted for invalidity challenges at CNIPA	7
Beijing Yiwen v. NETGER Beijing
Loss Contingencies [Line Items]
Number of patent infringement cases | case						2
Shangdong Chengzi Medical Technology v. NETGER Beijing
Loss Contingencies [Line Items]
Number of patent infringement cases | case					2
Gaoping Yaoyi Trading Co. v. NETGER Beijing
Loss Contingencies [Line Items]
Number of patent infringement cases | case				2
TrackThings LLC v. NETGEAR
Loss Contingencies [Line Items]
Number of patents		3
46 to 60 Days
Loss Contingencies [Line Items]
Percentage of cancelable orders																50.00%
31 to 45 Days
Loss Contingencies [Line Items]
Percentage of cancelable orders																25.00%
Minimum | 46 to 60 Days
Loss Contingencies [Line Items]
Required notice period prior to expected shipment date																46 days
Minimum | 31 to 45 Days
Loss Contingencies [Line Items]
Required notice period prior to expected shipment date																31 days
Maximum
Loss Contingencies [Line Items]
Ordering horizon extended period																18 months
Maximum | 46 to 60 Days
Loss Contingencies [Line Items]
Required notice period prior to expected shipment date																60 days
Maximum | 31 to 45 Days
Loss Contingencies [Line Items]
Required notice period prior to expected shipment date																45 days