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Segment and Geographic Information, Total Assets by Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Segment and Geographic Information [Abstract] |  |  |  |
Total assets |  | $ 1,276.7 | $ 1,536.1 |
Impairment charges |  | 166.8 | 8.6 | $ 0.4
Change in deferred tax asset valuation allowance |  | 22.0 | 9.2 |
Automotive [Member] |  |  |  |
Segment and Geographic Information [Abstract] |  |  |  |
Impairment charges |  | 1.7 |  |
Corporate [Member] |  |  |  |
Segment and Geographic Information [Abstract] |  |  |  |
Total assets |  | 17.5 |  |
Change in deferred tax asset valuation allowance |  | 103.3 |  |
Operating Segments [Member] | BHVAC [Member] |  |  |  |
Segment and Geographic Information [Abstract] |  |  |  |
Total assets |  | 110.8 | 102.3 |
Operating Segments [Member] | CIS [Member] |  |  |  |
Segment and Geographic Information [Abstract] |  |  |  |
Total assets |  | 609.2 | 617.7 |
Operating Segments [Member] | HDE [Member] |  |  |  |
Segment and Geographic Information [Abstract] |  |  |  |
Total assets |  | 438.7 | 417.4 |
Operating Segments [Member] | Automotive [Member] |  |  |  |
Segment and Geographic Information [Abstract] |  |  |  |
Total assets | [1] | 124.2 | 272.5 |
Corporate and Eliminations [Member] |  |  |  |
Segment and Geographic Information [Abstract] |  |  |  |
Total assets | [2] | $ (6.2) | $ 126.2 |
[1] | During fiscal 2021, the Company recorded impairment charges totaling $166.8 million within the Automotive segment, primarily related to the property, plant and equipment of the liquid- and air-cooled automotive businesses, which are classified as held for sale as of March 31, 2021. See Note 2 for additional information.
[2] | At March 31, 2021, Corporate assets totaled $17.5 million and were more than offset by eliminations for intercompany balances, including accounts receivable. During fiscal 2021, the Company recorded income tax charges totaling $103.3 million, which established a full valuation allowance on deferred tax assets in the U.S that are recorded at Corporate. See Note 8 for additional information.

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