Contingencies and Litigation	6 Months Ended
Sep. 30, 2017
Contingencies and Litigation [Abstract]
Contingencies and Litigation	Note 15: Contingencies and Litigation Environmental The United States Environmental Protection Agency has designated the Company as a potentially responsible party for remediation of three sites. These sites are: Auburn Incinerator, Inc./Lake Calumet Cluster (Illinois), Cam-Or (Indiana) and a scrap metal site known as Chemetco (Illinois). In addition, Modine is voluntarily participating in the care of an inactive landfill owned by the City of Trenton (Missouri). These sites are not Company-owned; however, they allegedly contain materials attributable to Modine from past operations. The percentage of material allegedly attributable to Modine is relatively low. Remediation of these sites is in various stages of administrative or judicial proceedings and includes recovery of past governmental costs and the costs of future investigations and remedial actions. The Company accrues for costs anticipated for the remedial settlement of the sites listed above if they are probable and can be reasonably determined. Costs anticipated for the remedial settlement of the sites listed above that are not probable or cannot be reasonably determined at this time have not been accrued; however, the Company does not believe any potential costs would be material to the Company’s financial position due to its relatively small portion of contributed materials. The Company has recorded environmental accruals for obligations assumed as a result of its recent acquisition of Luvata HTS, the most significant of which relates to historical soil and groundwater contamination remediation and monitoring for a manufacturing site in the United States. In addition, the Company has recorded environmental investigation and remediation accruals related to subsurface contamination at its former manufacturing facility in the Netherlands, investigative and remedial work related to a previously-owned manufacturing facility in the United States, and groundwater contamination at its manufacturing facility in Brazil, along with accruals for lesser environmental matters at certain other facilities in the United States. These accruals generally relate to facilities where past operations followed practices and procedures that were considered acceptable under then-existing regulations, or where the Company is a successor to the obligations of prior owners, and current laws and regulations require investigative and/or remedial work to ensure sufficient environmental compliance. The accruals for these environmental matters totaled $17.1 million and $16.8 million at September 30, 2017 and March 31, 2017, respectively. As additional information becomes available, the Company will re-assess the liabilities related to these matters and revise the estimated accruals, if necessary. Based upon currently available information, the Company believes the ultimate outcome of these matters, individually and in the aggregate, will not have a material adverse effect on its financial position. However, these matters are subject to inherent uncertainties, and unfavorable outcomes could occur, including significant monetary damages. Brazil Antitrust Investigation As of March 31, 2017, the Company accrued $4.7 million (BRL 15 million) related to alleged violations of Brazil’s antitrust regulations. During the first quarter of fiscal 2018, the Company paid $4.7 million to Brazil’s Administrative Council for Economic Defense to settle this matter. Other Litigation In the normal course of business, the Company and its subsidiaries are named as defendants in various other lawsuits and enforcement proceedings by private parties, governmental agencies and/or others in which claims are asserted against Modine. In the opinion of management, the liabilities, if any, which may ultimately result from such lawsuits or proceedings are not expected to have a material adverse effect on the Company’s financial position.

Note 15: Contingencies and Litigation

Environmental

The United States Environmental Protection Agency has designated the Company as a potentially responsible party for remediation of three sites. These sites are: Auburn Incinerator, Inc./Lake Calumet Cluster (Illinois), Cam-Or (Indiana) and a scrap metal site known as Chemetco (Illinois). In addition, Modine is voluntarily participating in the care of an inactive landfill owned by the City of Trenton (Missouri). These sites are not Company-owned; however, they allegedly contain materials attributable to Modine from past operations. The percentage of material allegedly attributable to Modine is relatively low. Remediation of these sites is in various stages of administrative or judicial proceedings and includes recovery of past governmental costs and the costs of future investigations and remedial actions. The Company accrues for costs anticipated for the remedial settlement of the sites listed above if they are probable and can be reasonably determined. Costs anticipated for the remedial settlement of the sites listed above that are not probable or cannot be reasonably determined at this time have not been accrued; however, the Company does not believe any potential costs would be material to the Company’s financial position due to its relatively small portion of contributed materials.

The Company has recorded environmental accruals for obligations assumed as a result of its recent acquisition of Luvata HTS, the most significant of which relates to historical soil and groundwater contamination remediation and monitoring for a manufacturing site in the United States. In addition, the Company has recorded environmental investigation and remediation accruals related to subsurface contamination at its former manufacturing facility in the Netherlands, investigative and remedial work related to a previously-owned manufacturing facility in the United States, and groundwater contamination at its manufacturing facility in Brazil, along with accruals for lesser environmental matters at certain other facilities in the United States. These accruals generally relate to facilities where past operations followed practices and procedures that were considered acceptable under then-existing regulations, or where the Company is a successor to the obligations of prior owners, and current laws and regulations require investigative and/or remedial work to ensure sufficient environmental compliance. The accruals for these environmental matters totaled $17.1 million and $16.8 million at September 30, 2017 and March 31, 2017, respectively. As additional information becomes available, the Company will re-assess the liabilities related to these matters and revise the estimated accruals, if necessary. Based upon currently available information, the Company believes the ultimate outcome of these matters, individually and in the aggregate, will not have a material adverse effect on its financial position. However, these matters are subject to inherent uncertainties, and unfavorable outcomes could occur, including significant monetary damages.

Brazil Antitrust Investigation

As of March 31, 2017, the Company accrued $4.7 million (BRL 15 million) related to alleged violations of Brazil’s antitrust regulations. During the first quarter of fiscal 2018, the Company paid $4.7 million to Brazil’s Administrative Council for Economic Defense to settle this matter.

Other Litigation

In the normal course of business, the Company and its subsidiaries are named as defendants in various other lawsuits and enforcement proceedings by private parties, governmental agencies and/or others in which claims are asserted against Modine. In the opinion of management, the liabilities, if any, which may ultimately result from such lawsuits or proceedings are not expected to have a material adverse effect on the Company’s financial position.