Earnings Per Share - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Antidilutive securities excluded (in shares)	139,839	110,002	87,425
Other Comprehensive Income (Loss)
Purchase of common stock (in shares)	179,311	0	0
Purchase of common stock	$ 40.9
2021 Share Repurchase Program
Other Comprehensive Income (Loss)
Purchase of common stock	38.9
2024 Share Repurchase Program
Other Comprehensive Income (Loss)
Purchase of common stock	2.0
Remaining authorized amount	$ 298.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References + Details

LITTELFUSE INC /DE 10-K