Annual report pursuant to Section 13 and 15(d)

Pension and Other Post-retirement Benefit Plans - Narrative (Details)

v3.19.1
Pension and Other Post-retirement Benefit Plans - Narrative (Details)
$ in Millions
12 Months Ended
Mar. 31, 2019
USD ($)
plan
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Number of Fiscal Years 10 years    
Number of defined benefit plans | plan 12    
Gains net of the employer matches related to the deferred compensation plan $ 0.1 $ 0.2 $ 0.2
Total benefits accrued 2.3 2.1  
Matched contribution of the entity 2.8 2.2 $ 2.4
Defined Benefit Plan Accumulated Other Comprehensive Income (Loss) Tax $ 2.4 $ 2.3  
Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Company matched contribution (as a percent) 6.00%    
Pension      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year $ 0.5    
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year 5.1    
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year 0.1    
Other Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year $ 0.1    
Number of defined benefit plans | plan 2    
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year $ 0.1    
Europe | Pension      
Defined Benefit Plan Disclosure [Line Items]      
Number of defined benefit plans | plan 6    
Singapore | Pension      
Defined Benefit Plan Disclosure [Line Items]      
Number of defined benefit plans | plan 1    
Mexico | Pension      
Defined Benefit Plan Disclosure [Line Items]      
Number of defined benefit plans | plan 2    
Japan | Pension      
Defined Benefit Plan Disclosure [Line Items]      
Number of defined benefit plans | plan 2    
THAILAND | Pension      
Defined Benefit Plan Disclosure [Line Items]      
Number of defined benefit plans | plan 1