Janus International Group Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Business Combinations - Narrative (Details)

Business Combinations - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	4 Months Ended	5 Months Ended
	Sep. 28, 2024	Sep. 28, 2024	May 17, 2025	Sep. 27, 2025	Dec. 28, 2024	May 17, 2024
Business Combination [Line Items]
Goodwill				$ 383.8	$ 383.1
Smith T.M.C., Inc
Business Combination [Line Items]
Interest acquired						100.00%
Goodwill						$ 14.8
Revenue	$ 13.7	$ 17.7	$ 7.3
Net income	$ 2.4	$ 2.9	$ 0.8

- Definition

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.

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+ Details

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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