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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.