EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income attributable to Franklin Electric Co., Inc.	$ 24,651	$ 32,745	$ 35,294	$ 41,801
Less: Earnings allocated to participating securities	200	200	200	300
Net income available to common shareholders	$ 24,500	$ 32,500	$ 35,100	$ 41,500
Basic
Basic weighted average common shares outstanding	46.2	46.3	46.3	46.3
Effect of dilutive securities:
Non-participating employee stock options and performance awards	0.3	0.4	0.4	0.4
Diluted weighted average common shares outstanding	46.5	46.7	46.7	46.7
Basic earnings per share (in dollars per share)	$ 0.53	$ 0.70	$ 0.76	$ 0.89
Diluted earnings per share (in dollars per share)	$ 0.52	$ 0.70	$ 0.75	$ 0.89
Anti-dilutive stock options (in shares)	0.4	0.3	0.3	0.2