EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net income attributable to Franklin Electric Co., Inc.	$ 32,745	$ 30,497	$ 41,801	$ 51,671
Less: Undistributed earnings allocated to participating securities	200	200	300	400
Net income available to common shareholders	$ 32,500	$ 30,300	$ 41,500	$ 51,300
Basic
Basic weighted average common shares outstanding (in shares)	46.3	46.5	46.3	46.5
Effect of dilutive securities:
Non-participating employee stock options and performance awards (in shares)	0.4	0.5	0.4	0.5
Diluted weighted average common shares outstanding (in shares)	46.7	47.0	46.7	47.0
Basic earnings per share (in dollars per share)	$ 0.70	$ 0.65	$ 0.89	$ 1.10
Diluted earnings per share (in dollars per share)	$ 0.70	$ 0.64	$ 0.89	$ 1.09
Anti-dilutive stock options (in shares)	0.3	0.2	0.2	0.2