Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill by Segment

The following table provides balances for goodwill by reportable segment as of March 31, 2021 (in millions):

	Communications		Clean Energy and Infrastructure		Oil and Gas		Electrical Transmission		Total Goodwill
Goodwill, gross	$	561.9	$	166.4	$	509.7	$	150.1	$	1,388.1
Accumulated impairment loss	—		—		(125.4)		—		(125.4)
Goodwill, net	$	561.9	$	166.4	$	384.3	$	150.1	$	1,262.7

Rollforward of Other Intangible Assets

The following table provides a reconciliation of changes in other intangible assets, net, for the period indicated (in millions):

	Other Intangible Assets
	Non-Amortizing		Amortizing
	Trade Names		Customer Relationships and Backlog		Pre-Qualifications		Other (a)		Total
Other intangible assets, gross, as of December 31, 2020	$	34.5	$	297.9	$	73.8	$	26.4	$	432.6
Accumulated amortization			(218.5)		(10.6)		(19.5)		(248.6)
Other intangible assets, net, as of December 31, 2020	$	34.5	$	79.4	$	63.2	$	6.9	$	184.0
Additions from new business combinations	—		48.0		—		4.3		52.3
Currency translation adjustments	—		—		0.5		—		0.5
Amortization expense			(7.9)		(2.7)		(0.6)		(11.2)
Other intangible assets, net, as of March 31, 2021	$	34.5	$	119.5	$	61.0	$	10.6	$	225.6

(a)Consists principally of trade names and non-compete agreements.