General	9 Months Ended
Dec. 31, 2012
General [Abstract]
General	Note 1: General The accompanying condensed consolidated financial statements were prepared in conformity with generally accepted accounting principles (GAAP) in the United States applied on a basis consistent with those principles used in the preparation of the annual consolidated financial statements of Modine Manufacturing Company (Modine or the Company) for the fiscal year ended March 31, 2012. The financial statements include all normal recurring adjustments that are, in the opinion of management, necessary for a fair statement of results for the interim periods. Results for the first nine months of fiscal 2013 are not necessarily indicative of the results to be expected for the full year. These financial statements should be read in conjunction with the consolidated financial statements and related notes in Modine's Annual Report on Form 10-K for the year ended March 31, 2012. Revision of prior period financial statements: As described in Note 1 and Note 26 of the Notes to Consolidated Financial Statements in Modine's Annual Report on Form 10-K for the year ended March 31, 2012, the quarterly results for fiscal 2012 have been revised as a result of errors identified during fiscal 2012 that were not considered material individually or in the aggregate to previously issued financial statements but were considered significant to the quarters in which they were identified. For the three months ended December 31, 2011, cost of sales decreased $0.3, gross profit increased $0.3, selling, general and administrative expenses decreased $0.7, provision for income taxes increased $0.3 and earnings from continuing operations increased $0.7 as a result of the revisions. Diluted earnings per share from continuing operations and diluted net earnings per share increased $0.01 for the three months ended December 31, 2011 as a result of these revisions. For the nine months ended December 31, 2011, cost of sales decreased $1.1, gross profit increased $1.1, selling, general and administrative expenses decreased $0.5, provision for income taxes increased $1.0 and earnings from continuing operations increased $0.6 as a result of the revisions. Diluted earnings per share from continuing operations and diluted net earnings per share increased $0.01 for the nine months ended December 31, 2011 as a result of these revisions. Out of period adjustment: During the first quarter of fiscal 2013, the Company identified an error related to certain commodity hedges that should have been deemed ineffective in the fourth quarter of fiscal 2012, which understated pre-tax earnings by $0.5 in the fourth quarter of fiscal 2012, and overstated pre-tax earnings by this same amount in the first quarter of fiscal 2013. This amount was not considered material to the financial statements of either the fourth quarter of fiscal 2012 or the first nine months of fiscal 2013. New accounting pronouncements: In June 2011, the Financial Accounting Standards Board (FASB) issued an amendment to the accounting guidance for the presentation of comprehensive income. This amendment removes one of the three presentation options for presenting the components of other comprehensive income as part of the statement of changes in shareholders' equity and requires either a single continuous statement of net income and other comprehensive income or a two consecutive statement approach. The Company adopted this guidance beginning in the first quarter of fiscal 2013 with the two consecutive statement approach. In September 2011, the FASB issued an amendment to the accounting guidance for testing goodwill for impairment. The amendment provides an option for companies to first use a qualitative approach to test goodwill for impairment if certain conditions are met. If it is determined to be more likely than not that the fair value of the reporting unit is less than its carrying amount, entities must perform the quantitative analysis of the goodwill impairment test. The amendment is effective for the Company's upcoming fiscal 2013 goodwill impairment test. The Company is assessing this new guidance and does not anticipate any impact on its consolidated financial statements from the adoption of this amendment.

General

9 Months Ended

Dec. 31, 2012

Note 1: General

The accompanying condensed consolidated financial statements were prepared in conformity with generally accepted accounting principles (GAAP) in the United States applied on a basis consistent with those principles used in the preparation of the annual consolidated financial statements of Modine Manufacturing Company (Modine or the Company) for the fiscal year ended March 31, 2012. The financial statements include all normal recurring adjustments that are, in the opinion of management, necessary for a fair statement of results for the interim periods. Results for the first nine months of fiscal 2013 are not necessarily indicative of the results to be expected for the full year. These financial statements should be read in conjunction with the consolidated financial statements and related notes in Modine's Annual Report on Form 10-K for the year ended March 31, 2012.

Revision of prior period financial statements: As described in Note 1 and Note 26 of the Notes to Consolidated Financial Statements in Modine's Annual Report on Form 10-K for the year ended March 31, 2012, the quarterly results for fiscal 2012 have been revised as a result of errors identified during fiscal 2012 that were not considered material individually or in the aggregate to previously issued financial statements but were considered significant to the quarters in which they were identified. For the three months ended December 31, 2011, cost of sales decreased $0.3, gross profit increased $0.3, selling, general and administrative expenses decreased $0.7, provision for income taxes increased $0.3 and earnings from continuing operations increased $0.7 as a result of the revisions. Diluted earnings per share from continuing operations and diluted net earnings per share increased $0.01 for the three months ended December 31, 2011 as a result of these revisions. For the nine months ended December 31, 2011, cost of sales decreased $1.1, gross profit increased $1.1, selling, general and administrative expenses decreased $0.5, provision for income taxes increased $1.0 and earnings from continuing operations increased $0.6 as a result of the revisions. Diluted earnings per share from continuing operations and diluted net earnings per share increased $0.01 for the nine months ended December 31, 2011 as a result of these revisions.

Out of period adjustment: During the first quarter of fiscal 2013, the Company identified an error related to certain commodity hedges that should have been deemed ineffective in the fourth quarter of fiscal 2012, which understated pre-tax earnings by $0.5 in the fourth quarter of fiscal 2012, and overstated pre-tax earnings by this same amount in the first quarter of fiscal 2013. This amount was not considered material to the financial statements of either the fourth quarter of fiscal 2012 or the first nine months of fiscal 2013.

New accounting pronouncements: In June 2011, the Financial Accounting Standards Board (FASB) issued an amendment to the accounting guidance for the presentation of comprehensive income. This amendment removes one of the three presentation options for presenting the components of other comprehensive income as part of the statement of changes in shareholders' equity and requires either a single continuous statement of net income and other comprehensive income or a two consecutive statement approach. The Company adopted this guidance beginning in the first quarter of fiscal 2013 with the two consecutive statement approach.

In September 2011, the FASB issued an amendment to the accounting guidance for testing goodwill for impairment. The amendment provides an option for companies to first use a qualitative approach to test goodwill for impairment if certain conditions are met. If it is determined to be more likely than not that the fair value of the reporting unit is less than its carrying amount, entities must perform the quantitative analysis of the goodwill impairment test. The amendment is effective for the Company's upcoming fiscal 2013 goodwill impairment test. The Company is assessing this new guidance and does not anticipate any impact on its consolidated financial statements from the adoption of this amendment.