Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 82.8	$ 88.1	$ 227.5	$ 232.1
Other comprehensive income (loss):
Foreign currency translation adjustments	16.1	(2.6)	35.3	(15.7)
Pension and post retirement benefit plans’ prior service costs and net actuarial gains, net of taxes	1.8	2.1	5.5	6.2
Unrealized gain (loss) on investments, net of taxes	0.5	(0.2)	1.0	0.3
Unrealized gain (loss) on cash flow hedges, net of taxes	(1.0)	0.6	(1.9)	(1.9)
Other comprehensive income (loss)	17.4	(0.1)	39.9	(11.1)
Total comprehensive income	100.2	88.0	267.4	221.0
Less: Comprehensive income attributable to noncontrolling interest	2.0	1.4	4.8	3.5
Comprehensive income attributable to Hubbell	$ 98.2	$ 86.6	$ 262.6	$ 217.5