FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	12 Months Ended
FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Total debt, carrying value	$ 167.0	$ 129.4
Business Combination, Pro Forma Information, Nonrecurring Adjustment, Acquisition-Related Cost
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0.0	5.0	$ 3.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)	0.0	1.3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	0.0	0.7
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(5.0)	0.0
Recurring Basis
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Cash equivalents	10.2	5.0
Marketable Securities	9.7
Trading Liabilities, Fair Value Disclosure		2.5
Business Combination, Contingent Consideration, Liability		5.0
Financial Liabilities Fair Value Disclosure	0.0	7.5
Assets, Fair Value Disclosure	19.9	5.0
Recurring Basis \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Cash equivalents	10.2	5.0
Marketable Securities	9.7
Trading Liabilities, Fair Value Disclosure		2.5
Business Combination, Contingent Consideration, Liability		0.0
Financial Liabilities Fair Value Disclosure	0.0	2.5
Assets, Fair Value Disclosure	19.9	5.0
Recurring Basis \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Cash equivalents	0.0	0.0
Marketable Securities	0.0
Trading Liabilities, Fair Value Disclosure		0.0
Business Combination, Contingent Consideration, Liability		0.0
Financial Liabilities Fair Value Disclosure	0.0	0.0
Assets, Fair Value Disclosure	0.0	0.0
Recurring Basis \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Cash equivalents	0.0	0.0
Marketable Securities	0.0
Trading Liabilities, Fair Value Disclosure		0.0
Business Combination, Contingent Consideration, Liability		5.0
Financial Liabilities Fair Value Disclosure	0.0	5.0
Assets, Fair Value Disclosure	0.0	0.0
Carrying value
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Total debt, carrying value	167.0	129.4
Fair value \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring and Nonrecurring Basis
Total debt, fair value	$ 160.6	$ 128.0

FRANKLIN ELECTRIC CO INC 10-K