Basis of Financial Statements - Schedule of impact of the prior period corrections (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Jul. 02, 2023	Apr. 02, 2023	Jan. 01, 2023	Jul. 03, 2022
ASSETS
Deferred income taxes	$ 13,713		$ 13,619
Total assets	348,549		340,930
LIABILITIES AND SHAREHOLDERS’ EQUITY
Total current liabilities	120,772		108,986
Accrued postretirement obligations	1,137		1,157
Retained earnings	240,992		234,299			$ 240,969
Accumulated other comprehensive loss	(13,205)		(14,194)			(18,588)
Total STRATTEC SECURITY CORPORATION shareholders’ equity	193,827		184,963			188,400
Total shareholders’ equity	220,114	$ 217,641	211,024	$ 218,473	$ 217,676	219,947
Total liabilities and shareholders' equity	348,549		340,930
Accrued Liabilities:
Payroll and benefits	27,268		22,616
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss	(13,205)		(14,194)			(18,588)
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss						(16,733)
Total shareholders’ equity	(12,178)	(12,805)	(13,028)	(15,207)	(17,511)	(16,733)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss						(16,733)
Retirement and Postretirement Benefit Plans
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss						(1,855)
Total shareholders’ equity	$ (1,027)	$ (1,073)	$ (1,166)	$ (1,365)	$ (1,715)	(1,855)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss						(1,855)
Previously Reported
LIABILITIES AND SHAREHOLDERS’ EQUITY
Retained earnings						241,504
Accumulated other comprehensive loss						(18,657)
Total STRATTEC SECURITY CORPORATION shareholders’ equity						188,866
Total shareholders’ equity						220,413
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss						(18,657)
Previously Reported | Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss						(16,723)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss						(16,723)
Previously Reported | Retirement and Postretirement Benefit Plans
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss						(1,934)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss						(1,934)
Adjustment
LIABILITIES AND SHAREHOLDERS’ EQUITY
Retained earnings						(535)
Accumulated other comprehensive loss						69
Total STRATTEC SECURITY CORPORATION shareholders’ equity						(466)
Total shareholders’ equity						(466)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss						69
Adjustment | Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss						(10)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss						(10)
Adjustment | Retirement and Postretirement Benefit Plans
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss						79
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss						$ 79