EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net income attributable to Franklin Electric Co., Inc.	$ 27,880	$ 10,643
Less: Earnings allocated to participating securities	200	0
Net income available to common shareholders	$ 27,700	$ 10,600
Basic
Basic weighted average common shares outstanding	46.3	46.4
Effect of dilutive securities:
Non-participating employee stock options and performance awards	0.6	0.4
Diluted weighted average common shares outstanding	46.9	46.8
Basic	$ 0.60	$ 0.23
Diluted	$ 0.59	$ 0.23
Anti-dilutive stock options (in shares)	0.1	0.3