Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 97.9	$ 102.4	$ 171.7	$ 162.2
Other comprehensive income (loss):
Foreign currency translation adjustments	(3.8)	(30.6)	3.3	(20.8)
Defined benefit pension and post-retirement plans, net of taxes	1.9	1.9	3.4	3.9
Unrealized gain (loss) on investments, net of taxes	0.3	(0.1)	0.6	(0.4)
Unrealized gain (loss) on cash flow hedges, net of taxes	(0.7)	1.0	(1.3)	1.6
Other comprehensive income	(2.3)	(27.8)	6.0	(15.7)
Total comprehensive income	95.6	74.6	177.7	146.5
Less: Comprehensive income attributable to noncontrolling interest	1.9	2.1	3.4	3.6
Comprehensive income attributable to Hubbell	$ 93.7	$ 72.5	$ 174.3	$ 142.9