Organization and Nature of Operations	9 Months Ended
Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Nature of Operations	1. Organization and Nature of Operations Headquartered in Braintree, Massachusetts, Altra Industrial Motion Corp. (the “Company”, “Altra”, “we”, or “our”) is a leading global designer, producer and marketer of a wide range of electro-mechanical power transmission motion control (“PTMC”) products. The Company brings together strong brands with production facilities in 16 countries. As of September 30, 2022, Altra’s leading brands included Ameridrives Couplings, Bauer Gear Motor, Bibby Turboflex, Boston Gear, Delroyd Worm Gear, Formsprag Clutch, Guardian Couplings, Huco, Industrial Clutch, Inertia Dynamics, Kilian Manufacturing, Kollmorgen, Lamiflex Couplings, Marland Clutch, Matrix, Nook Industries, Nuttall Gear, Portescap, Stieber Clutch, Stromag, Svendborg Brakes, TB Wood’s, Thomson, Twiflex, Warner Electric, Warner Linear, and Wichita Clutch.

The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI https://asc.fasb.org/topic&trid=2134479

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