Commitments and Contingencies - Narrative (Details) € in Millions, $ in Millions, $ in Millions, $ in Millions, ₩ in Billions								3 Months Ended	12 Months Ended
	Nov. 30, 2018 USD ($)	Nov. 30, 2018 KRW (₩)	Jun. 27, 2018 USD ($)	Jun. 27, 2018 CAD ($)	Mar. 21, 2018 EUR (€)	Mar. 21, 2018 USD ($)	Sep. 02, 2015	Dec. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2020 TWD ($)
Loss Contingencies [Line Items]
Document Period End Date									Mar. 31, 2020	Mar. 31, 2020
Taiwan | Minimum
Loss Contingencies [Line Items]
Damages sought, value									$ 20.2	$ 609.1
U.S. Class Action Complaint [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount								$ 62.0
TOKIN
Loss Contingencies [Line Items]
Loss contingency accrual									77.4
TOKIN | Settled Litigation | UNITED STATES
Loss Contingencies [Line Items]
Litigation settlement, amount									$ 13.8
Payment period							5 years
Fine, number of payments									6	6
Litigation Settlement, Amount Awarded to Other Party Yearly Installment									$ 2.3
Fine, Number of Payments Paid									5	5
TOKIN | Settled Litigation | CANADA
Loss Contingencies [Line Items]
Damages paid, value			$ 2.2	$ 2.9
TOKIN | Pending Litigation [Member] | Taiwan
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party									$ 8.1	$ 243.6
TOKIN | Competition Laws of the European Union
Loss Contingencies [Line Items]
Litigation settlement, amount					€ 8.8	$ 10.3
TOKIN | Monopoly and Fair Trade Laws [Member] | KOREA, REPUBLIC OF
Loss Contingencies [Line Items]
Litigation settlement, amount	$ 7.2	₩ 8.1
NEC TOKIN Corporation | Competition Laws of the European Union
Loss Contingencies [Line Items]
Litigation settlement, amount					€ 5.0	$ 5.9
30 days from date of settlement [Member] | U.S. Class Action Complaint [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount								$ 10.0