EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income attributable to Franklin Electric Co., Inc.	$ 38,372	$ 33,907	$ 73,666	$ 75,708
Less: Earnings allocated to participating securities	300	200	500	500
Net income available to common shareholders	$ 38,100	$ 33,700	$ 73,200	$ 75,200
Basic
Basic weighted average common shares outstanding	46.2	46.4	46.2	46.3
Effect of dilutive securities:
Non-participating employee stock options and performance awards	0.4	0.3	0.4	0.4
Diluted weighted average common shares outstanding	46.6	46.7	46.6	46.7
Basic	$ 0.82	$ 0.73	$ 1.58	$ 1.62
Diluted	$ 0.82	$ 0.72	$ 1.57	$ 1.61
Anti-dilutive stock options (in shares)	0.3	0.3	0.4	0.3