EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net income attributable to Franklin Electric Co., Inc.	$ 33,907	$ 30,006	$ 75,708	$ 81,677
Less: Earnings allocated to participating securities	200	200	500	600
Net income available to common shareholders	$ 33,700	$ 29,800	$ 75,200	$ 81,100
Basic
Basic weighted average common shares outstanding	46.4	46.7	46.3	46.7
Effect of dilutive securities:
Non-participating employee stock options and performance awards	0.3	0.5	0.4	0.5
Diluted weighted average common shares outstanding	46.7	47.2	46.7	47.2
Basic earnings per share (in dollars per share)	$ 0.73	$ 0.64	$ 1.62	$ 1.74
Diluted earnings per share (in dollars per share)	$ 0.72	$ 0.63	$ 1.61	$ 1.72
Anti-dilutive stock options (in shares)	0.3	0.2	0.3	0.2