Commitments and Contingencies - Narrative (Details) € in Thousands		1 Months Ended		3 Months Ended	9 Months Ended		12 Months Ended
	Feb. 21, 2022 EUR (€)	Sep. 30, 2025 USD ($) lawsuit	Sep. 30, 2025 EUR (€)	Sep. 30, 2025 USD ($) lawsuit	Sep. 30, 2025 USD ($) lawsuit	Sep. 30, 2025 EUR (€)	Dec. 31, 2020	Dec. 31, 2016 EUR (€)	Nov. 05, 2025 claim	Sep. 30, 2025 EUR (€) lawsuit	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Sep. 30, 2024 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Mar. 05, 2019 EUR (€)
Other Commitments [Line Items]
Reimbursed legal fees					$ 342,602			€ 292
Accrued environmental loss contingencies		$ 394,587,000		$ 394,587,000	394,587,000						$ 0
Imposed cost		127,700,000		127,700,000	127,700,000					€ 108,800
Pending Litigation
Other Commitments [Line Items]
Estimate of possible loss		671,200,000		671,200,000	671,200,000
Judicial Ruling
Other Commitments [Line Items]
Estimate of possible loss \| €																€ 572,100
SNIA
Other Commitments [Line Items]
Loss contingency, damages awarded and subsequently dismissed					184,500,000	€ 157,300
Accrued environmental loss contingencies		394,600,000		394,600,000	394,600,000					336,300
SNIA \| Pending Litigation \| SNIA s.p.a
Other Commitments [Line Items]
Compensation sought					4,000,000,000.0
Non-privileged creditor, amount		532,200,000		532,200,000	532,200,000					€ 453,600
SNIA \| Judicial Ruling
Other Commitments [Line Items]
Estimate of possible loss														$ 532,200,000	€ 453,600
Payment period (in days)	30 days
SNIA \| Judicial Ruling \| Surety Bond
Other Commitments [Line Items]
Bond required to be posted	€ 270,000				316,800,000
Product Liability
Other Commitments [Line Items]
Bond required to be posted					1,951,000
Loss contingency accrual		19,776,000		19,776,000	19,776,000						15,843,000
3T litigation provision				4,400,000	4,989,000
Product Liability \| Subsequent Event
Other Commitments [Line Items]
Number of claims \| claim									65
Italian MedTech Payback \| Pending Litigation
Other Commitments [Line Items]
Estimate of possible loss		12,300,000		$ 12,300,000	$ 12,300,000						16,000,000
Bond required to be posted		4,100,000	€ 3,500
Loss contingency reversal in period		$ 3,800,000
Italian MedTech Payback 2015-2018 Settlement \| Pending Litigation
Other Commitments [Line Items]
Estimate of possible loss											7,000,000
Cyber Litigation \| Pending Litigation
Other Commitments [Line Items]
Loss contingency accrual													$ 1,200,000
Number of claims \| lawsuit		6		6	6					6
Saluggia, Italy
Other Commitments [Line Items]
Period to demonstrate financial capacity (in years)							5 years
Estimate of possible loss											$ 36,700,000	€ 35,400
Saluggia, Italy \| Minimum
Other Commitments [Line Items]
Estimate of possible loss		$ 40,300,000		$ 40,300,000	$ 40,300,000					€ 34,300
Saluggia, Italy \| Maximum
Other Commitments [Line Items]
Estimate of possible loss		$ 55,200,000		$ 55,200,000	$ 55,200,000					€ 47,000

LivaNova PLC 10-Q