Commitments and Contingencies - Narrative (Details) $ in Thousands, € in Millions, ¥ in Millions, R$ in Millions, $ in Millions, $ in Millions, ₩ in Billions																				12 Months Ended
	Nov. 30, 2018 USD ($)	Nov. 30, 2018 KRW (₩)	Jun. 27, 2018 USD ($)	Jun. 27, 2018 CAD ($)	May 15, 2018 item	Mar. 21, 2018 USD ($)	Mar. 21, 2018 EUR (€)	Mar. 16, 2018 USD ($)	Mar. 02, 2018 USD ($)	Jan. 31, 2018 item	Jul. 29, 2017 item	Jan. 31, 2017 item	Jul. 29, 2016 item	Jul. 26, 2016 USD ($)	Jul. 26, 2016 BRL (R$)	Jul. 15, 2016 USD ($) suit item	Feb. 29, 2016 item	Sep. 02, 2015	Jul. 31, 2013 defendant suit	Mar. 31, 2019 USD ($) item	Mar. 31, 2019 JPY (¥) item	Mar. 31, 2019 TWD ($) item
Loss Contingencies [Line Items]
Document Period End Date																				Mar. 31, 2019	Mar. 31, 2019	Mar. 31, 2019
Taiwan
Loss Contingencies [Line Items]
Damages sought, value																				$ 39,500		$ 1,200.0
Taiwan | Minimum
Loss Contingencies [Line Items]
Damages sought, value																				19,800		$ 609.1
Japan
Loss Contingencies [Line Items]
Litigation settlement, amount																				1,100	¥ 127.2
Settled Litigation | Brazil
Loss Contingencies [Line Items]
Damages paid, value														$ 200	R$ 0.6
Equity Method Investments | Indemnification Agreement
Loss Contingencies [Line Items]
Litigation settlement, amount																				13,800
Equity Method Investments | Indemnification Agreement | Settled Litigation
Loss Contingencies [Line Items]
Litigation settlement, amount																				$ 2,300
Fine, Number of Payment Made to Date | item																				4	4	4
Payment period																		5 years
Fine, number of payments | item										1		1					1			6	6	6
Lithium Ion Batteries Antitrust Litigation
Loss Contingencies [Line Items]
Number of defendants | defendant																			8
Pending claims, number | suit																			2
Capacitors Antitrust Litigation
Loss Contingencies [Line Items]
Pending claims, number | suit																2
TOKIN
Loss Contingencies [Line Items]
Loss contingency accrual																				$ 37,700
TOKIN | Accounts Payable
Loss Contingencies [Line Items]
Loss contingency accrual																				15,000
TOKIN | Accrued Liabilities
Loss Contingencies [Line Items]
Loss contingency accrual																				9,500
TOKIN | Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Loss contingency accrual																				13,200
TOKIN | Settled Litigation | CANADA
Loss Contingencies [Line Items]
Damages paid, value			$ 2,200	$ 2.9
TOKIN | Pending Litigation [Member] | Taiwan
Loss Contingencies [Line Items]
Damages paid, value																				$ 4,900		$ 152.3
TOKIN | Lithium Ion Batteries Antitrust Litigation
Loss Contingencies [Line Items]
Number of defendants | defendant																			1
Litigation settlement, amount								$ 4,950	$ 2,000
TOKIN | Competition Laws of the European Union
Loss Contingencies [Line Items]
Litigation settlement, amount						$ 10,300	€ 8.8
TOKIN | Monopoly and Fair Trade Laws [Member] | KOREA, REPUBLIC OF
Loss Contingencies [Line Items]
Litigation settlement, amount	$ 7,200	₩ 8.1
NEC TOKIN Corporation | Equity Method Investments | Indemnification Agreement
Loss Contingencies [Line Items]
Litigation settlement, amount																$ 37,300
Fine, number of payments | item					1						1		1			5
NEC TOKIN Corporation | Competition Laws of the European Union
Loss Contingencies [Line Items]
Litigation settlement, amount						$ 5,900	€ 5.0