Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 63.9	$ 62.0
Other comprehensive income (loss):
Foreign currency translation adjustments	11.5	0.7
Pension and post retirement benefit plans’ prior service costs and net actuarial gains, net of taxes	1.7	2.0
Unrealized gain (loss) on investments, net of taxes	0.4	0.3
Unrealized gain (loss) on cash flow hedges, net of taxes	(0.1)	(2.3)
Other comprehensive income (loss)	13.5	0.7
Total comprehensive income	77.4	62.7
Less: Comprehensive income attributable to noncontrolling interest	1.1	1.1
Comprehensive income attributable to Hubbell	$ 76.3	$ 61.6