Goodwill and Other Intangibles (Tables)

9 Months Ended

Sep. 30, 2021

The following table shows the changes in goodwill by reportable segment and in total:

	East		West
	Group		Group			Total
	(Dollars in Millions)
Balance at January 1, 2021	$	572.5	$	1,841.5		$	2,414.0
Acquisitions		185.9		12.8			198.7
Goodwill allocated to assets held for sale		—		(2.1	)		(2.1	)
Balance at September 30, 2021	$	758.4	$	1,852.2		$	2,610.6

Intangible assets subject to amortization consist of the following:

At September 30, 2021 and December 31, 2020, intangible assets deemed to have an indefinite life and not being amortized consist of the following:

(Dollars in Millions)	Building Materials business		Magnesia Specialties		Total
Operating permits	$	6.6	$	—	$	6.6
Use rights		26.7		—		26.7
Trade names		0.2		2.5		2.7
Total	$	33.5	$	2.5	$	36.0

For the nine months ended September 30, 2021, the Company acquired $294.9 million of intangibles, which consists of the following:

(Dollars in Millions)	Amount		Weighted-average amortization period
Subject to amortization:
Customer relationships	$	221.4	24 years
Permits		63.0	40 years
Trade name		10.5	9 years
Total	$	294.9	27 years

The estimated amortization expense for intangibles for the remainder of 2021, each of the next four years, and thereafter is as follows: