Derivative Financial Instruments and Risk Management - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jan. 03, 2025 USD ($) instrument	Sep. 30, 2022 USD ($) derivative	May 31, 2020 USD ($) derivative
Derivatives, Fair Value [Line Items]
Derivative asset	$ 5.4		$ 5.4		$ 6.3
Accumulated other comprehensive income (loss)	3.0	$ (2.8)	$ (20.3)	$ (5.4)
Cross Currency Swaps Expiring in January 2032
Derivatives, Fair Value [Line Items]
Number of foreign currency derivatives held \| instrument							5
Not Designated as Hedging Instrument \| Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Derivative, term of contract (less than)			1 year
Cross currency swap amount	498.9		$ 498.9
Cash Flow Hedging \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative asset					3.0
Accumulated other comprehensive income (loss)					$ 2.1
Cash Flow Hedging \| Designated as Hedging Instrument \| Interest Rate Swap
Derivatives, Fair Value [Line Items]
Number of derivative instruments held \| derivative									1
Cash Flow Hedging \| Designated as Hedging Instrument \| Forward Starting Interest Rate Swap
Derivatives, Fair Value [Line Items]
Cross currency swap amount								$ 200.0	$ 50.0
Number of derivative instruments held \| derivative								4
Fair Value Hedging \| Cross Currency Swaps Expiring in June 2030
Derivatives, Fair Value [Line Items]
Cross currency swap amount						$ 578.0
Fair Value Hedging \| Cross Currency Swaps Expiring in January 2032
Derivatives, Fair Value [Line Items]
Cross currency swap amount							$ 696.5
Fair value of derivatives	117.4		117.4
Recorded in accumulated other comprehensive income, net of tax	71.5		71.5
Fair Value Hedging \| Cross Currency Swaps Expiring in June 2029 and 2031
Derivatives, Fair Value [Line Items]
Cross currency swap amount	1,600.0		1,600.0
Fair value of derivatives	32.7		32.7
Recorded in accumulated other comprehensive income, net of tax	24.4		24.4
Fair Value Hedging \| Cross Currency Swaps Expiring in June 2029
Derivatives, Fair Value [Line Items]
Cross currency swap amount	986.0		986.0
Fair Value Hedging \| Cross Currency Swaps Expiring in June 2031
Derivatives, Fair Value [Line Items]
Cross currency swap amount	$ 581.0		$ 581.0

JBT Marel Corp 10-Q