Basis of Presentation	3 Months Ended
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Meritor, Inc. (the "company" or "Meritor"), headquartered in Troy, Michigan, is a premier global supplier of a broad range of integrated systems, modules and components to original equipment manufacturers ("OEMs") and the aftermarket for the commercial vehicle, transportation and industrial sectors. The company serves commercial truck, trailer, military, bus and coach, construction and other industrial OEMs and certain aftermarkets. The Condensed Consolidated Financial Statements are those of the company and its consolidated subsidiaries. Certain businesses are reported in discontinued operations in the Condensed Consolidated Statement of Operations, Condensed Consolidated Statement of Cash Flows and related notes for all periods presented. Additional information regarding discontinued operations is discussed in Note 5. In the opinion of the company, the unaudited Condensed Consolidated Financial Statements contain all adjustments, consisting solely of adjustments of a normal, recurring nature, necessary to present fairly the financial position, results of operations and cash flows for the periods presented. These statements should be read in conjunction with the company’s audited consolidated financial statements and notes thereto included in the company's Annual Report on Form 10-K for the fiscal year ended September 30, 2018. The Condensed Consolidated Balance Sheet data as of September 30, 2018 was derived from audited financial statements but does not include all annual disclosures required by accounting principles generally accepted in the United States of America. The results of operations for the three months ended December 31, 2018 are not necessarily indicative of the results for the full year. The company’s fiscal year ends on the Sunday nearest September 30, and its fiscal quarters generally end on the Sundays nearest December 31, March 31 and June 30. The first quarter of fiscal years 2019 and 2018 ended on December 30, 2018 and December 31, 2017, respectively. All year and quarter references relate to the company’s fiscal year and fiscal quarters, unless otherwise stated. For ease of presentation, September 30 and December 31 are used consistently throughout this report to represent the fiscal year end and first fiscal quarter end, respectively.

Basis of Presentation

Meritor, Inc. (the "company" or "Meritor"), headquartered in Troy, Michigan, is a premier global supplier of a broad range of integrated systems, modules and components to original equipment manufacturers ("OEMs") and the aftermarket for the commercial vehicle, transportation and industrial sectors. The company serves commercial truck, trailer, military, bus and coach, construction and other industrial OEMs and certain aftermarkets. The Condensed Consolidated Financial Statements are those of the company and its consolidated subsidiaries.

Certain businesses are reported in discontinued operations in the Condensed Consolidated Statement of Operations, Condensed Consolidated Statement of Cash Flows and related notes for all periods presented. Additional information regarding discontinued operations is discussed in Note 5.

In the opinion of the company, the unaudited Condensed Consolidated Financial Statements contain all adjustments, consisting solely of adjustments of a normal, recurring nature, necessary to present fairly the financial position, results of operations and cash flows for the periods presented. These statements should be read in conjunction with the company’s audited consolidated financial statements and notes thereto included in the company's Annual Report on Form 10-K for the fiscal year ended September 30, 2018. The Condensed Consolidated Balance Sheet data as of September 30, 2018 was derived from audited financial statements but does not include all annual disclosures required by accounting principles generally accepted in the United States of America. The results of operations for the three months ended December 31, 2018 are not necessarily indicative of the results for the full year.

The company’s fiscal year ends on the Sunday nearest September 30, and its fiscal quarters generally end on the Sundays nearest December 31, March 31 and June 30. The first quarter of fiscal years 2019 and 2018 ended on December 30, 2018 and December 31, 2017, respectively. All year and quarter references relate to the company’s fiscal year and fiscal quarters, unless otherwise stated. For ease of presentation, September 30 and December 31 are used consistently throughout this report to represent the fiscal year end and first fiscal quarter end, respectively.