Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 181.5	$ 79.1
Other comprehensive income (loss):
Foreign currency translation adjustments	4.6	(6.6)
Reclassification of currency translation losses included in net income	0.5	0.0
Defined benefit pension and post-retirement plans, net of taxes	2.1	2.0
Unrealized losses on investments, net of taxes	(1.2)	(0.1)
Unrealized (losses) gains on cash flow hedges, net of taxes	(0.6)	0.1
Other comprehensive income (loss)	5.4	(4.6)
Comprehensive income	186.9	74.5
Less: Comprehensive income attributable to noncontrolling interest	1.3	1.4
Comprehensive income attributable to Hubbell Incorporated	$ 185.6	$ 73.1