Annual report pursuant to Section 13 and 15(d)

Income Taxes - Provision (Benefit) For Income Taxes Differences (Details)

v3.20.1
Income Taxes - Provision (Benefit) For Income Taxes Differences (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Income Tax Contingency [Line Items]      
Change in U.S. valuation allowance 0.20% (39.80%) (35.70%)
Effect of prior year adjustments 6.10% 1.40% (0.70%)
Effective Income Tax Rate Amount Reconciliation, Differences Due To Tax Law, Section 162(M) Limitations 1.10% 2.70% 0.00%
Effective Income Tax Rate Reconciliation, Foreign Income, Amount 6.00% 2.10% 11.80%
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent 2.10% 0.00% 0.30%
Taxable foreign source income 5.40% 3.80% (0.20%)
Non-taxable gain from bargain purchase 0.00% 0.00% (22.00%)
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Percent 0.00% (1.40%) 0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent (1.30%) (2.50%) (3.00%)
Differences due to tax law changes 0.002 0 0.269
State income taxes, net of federal taxes (4) 1.20% (0.40%) (1.80%)
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Percent 3.00% 0.00% 0.00%
Change in foreign tax law 0.10% (1.20%) 0.10%
Change in foreign operations valuation allowance (0.40%) (24.10%) (3.60%)
Foreign earnings     $ 4.8
Change in foreign operations tax exposure reserves 1.00% 0.10% 0.50%
Tax rate adjustment     $ 45.6
Statutory tax rate, percent 21.00% 21.00% 31.60%
Effective Income Tax Rate Reconciliation, Percent 48.30% (23.20%) 4.90%
Foreign Tax Authority [Member]      
Income Tax Contingency [Line Items]      
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent 2.60% 6.70% 0.40%
Operating loss carryforwards $ 114.4    
Domestic Tax Authority [Member]      
Income Tax Contingency [Line Items]      
Operating loss carryforwards 82.4    
Differences due to tax law, section 162(m) limitations   $ 1.5  
State and Local Jurisdiction      
Income Tax Contingency [Line Items]      
Operating loss carryforwards 545.0    
State and Local Jurisdiction | United States      
Income Tax Contingency [Line Items]      
Operating loss carryforwards $ 3.7    
Capacitors Antitrust Litigation      
Income Tax Contingency [Line Items]      
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent 0.00% 8.40% 0.30%