Basis of Financial Statements - Schedule of impact of the prior period corrections (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Oct. 01, 2023	Jul. 02, 2023	Jan. 01, 2023	Oct. 02, 2022	Jul. 03, 2022
ASSETS
Deferred income taxes	$ 13,625		$ 13,619
Total assets	331,751		340,930
LIABILITIES AND SHAREHOLDERS’ EQUITY
Total current liabilities	106,336		108,986
Accrued postretirement obligations	1,154		1,157
Retained earnings	239,486		234,299		$ 241,094	$ 240,969
Accumulated other comprehensive loss	(13,878)		(14,194)		(19,256)	(18,588)
Total STRATTEC SECURITY CORPORATION shareholders’ equity	191,390		184,963		188,594	188,400
Total shareholders’ equity	217,641	$ 215,301	211,024	$ 217,676	219,409	219,947
Total liabilities and shareholders' equity	331,751		340,930
Accrued Liabilities:
Payroll and benefits	23,110		22,616
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss	(13,878)		(14,194)		(19,256)	(18,588)
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss					(17,471)	(16,733)
Total shareholders’ equity	(12,805)	(13,407)	(13,028)	(17,511)	(17,471)	(16,733)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss					(17,471)	(16,733)
Retirement and Postretirement Benefit Plans
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss					(1,785)	(1,855)
Total shareholders’ equity	$ (1,073)	$ (1,120)	$ (1,166)	$ (1,715)	(1,785)	(1,855)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss					(1,785)	(1,855)
Previously Reported
LIABILITIES AND SHAREHOLDERS’ EQUITY
Retained earnings					241,632	241,504
Accumulated other comprehensive loss					(19,320)	(18,657)
Total STRATTEC SECURITY CORPORATION shareholders’ equity					189,068	188,866
Total shareholders’ equity					219,883	220,413
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss					(19,320)	(18,657)
Previously Reported | Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss					(17,461)	(16,723)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss					(17,461)	(16,723)
Previously Reported | Retirement and Postretirement Benefit Plans
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss					(1,859)	(1,934)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss					(1,859)	(1,934)
Adjustment
LIABILITIES AND SHAREHOLDERS’ EQUITY
Retained earnings					(538)	(535)
Accumulated other comprehensive loss					64	69
Total STRATTEC SECURITY CORPORATION shareholders’ equity					(474)	(466)
Total shareholders’ equity					(474)	(466)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss					64	69
Adjustment | Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss					(10)	(10)
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss					(10)	(10)
Adjustment | Retirement and Postretirement Benefit Plans
LIABILITIES AND SHAREHOLDERS’ EQUITY
Accumulated other comprehensive loss					74	79
Accumulated Other Comprehensive Loss:
Accumulated other comprehensive loss					$ 74	$ 79