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Significant Accounting Policies (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015 | Nov. 30, 2016
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired ownership interest by the entity |  |  |  | 100.00% |  |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |  |  |  |  |  |
Gain within other income related to insurance settlement | $ 9.5 |  |  | $ 0.0 | [1] | $ 9.5 | [1] | $ 0.0 | [1] |
Assets Held For Sale [Abstract] |  |  |  |  |  |  |  |  |  |
Carrying value of assets held-for-sale | 8.5 |  |  | 5.0 |  | 8.5 |  |  |  |
Research and development [Abstract] |  |  |  |  |  |  |  |  |  |
Research and development cost |  |  |  | 64.4 |  | 61.1 |  | 62.0 |  |
Short-term investments [Abstract] |  |  |  |  |  |  |  |  |  |
Short-term investments | 3.3 |  |  | 4.7 |  | 3.3 |  |  |  |
Trade accounts receivable [Abstract] |  |  |  |  |  |  |  |  |  |
Trade receivables, allowance for doubtful accounts | 0.5 |  |  | 1.4 |  | 0.5 |  |  |  |
Trade receivables sold without recourse |  |  |  | 55.4 |  | 71.3 |  | 87.0 |  |
Loss on the sale of accounts receivables |  |  |  | (0.3) |  | (0.3) |  | (0.3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Expected reclassification of net benefit costs |  |  |  | 3.0 |  | 45.0 |  |  |  |
Settlements | (1.8) | $ (1.1) | $ (39.2) |  |  | 42.1 |  |  |  |
Supplemental cash flow information [Abstract] |  |  |  |  |  |  |  |  |  |
Interest paid |  |  |  | 15.4 |  | 10.7 |  | 10.3 |  |
Income taxes paid |  |  |  | 12.7 |  | 10.1 |  | $ 15.9 |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Expected net periodic benefit cost |  |  |  | 3.0 |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Expected net periodic benefit cost |  |  |  | $ 4.0 |  |  |  |  |  |
Loss by Fire [Member] |  |  |  |  |  |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |  |  |  |  |  |
Gain within other income related to insurance settlement |  |  |  |  |  | 9.5 |  |  |  |
Tools [Member] |  |  |  |  |  |  |  |  |  |
Tooling [Abstract] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, depreciable lives |  |  |  | 3 years |  |  |  |  |  |
Company-owned tooling, net | 18.8 |  |  | $ 20.8 |  | 18.8 |  |  |  |
Customer owned tooling receivable | 8.5 |  |  | 7.8 |  | 8.5 |  |  |  |
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Expected reclassification of net benefit costs |  |  |  | 2.0 |  | 35.0 |  |  |  |
Cost of Sales [Member] |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |
Expected reclassification of net benefit costs |  |  |  | $ 1.0 |  | 10.0 |  |  |  |
Electronics Cooling Business [Member] |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Final payment on promissory note | $ 1.5 |  |  |  |  | 1.5 |  |  |  |
Gain on sale (Pre-tax) |  |  |  |  |  | 0.9 |  |  |  |
Gain on sale (After-tax) |  |  |  |  |  | $ 0.6 |  |  |  |
Luvata HTS [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired ownership interest by the entity |  |  |  |  |  |  |  |  |  | 100.00%
[1] | During fiscal 2016, the Company settled an insurance claim related to machinery and equipment destroyed in a fire at its Airedale facility and recorded a gain of $9.5 million. See Note 1 for additional information.

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