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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Note C: Goodwill and Other Intangible Assets The following table shows the changes in goodwill by reportable segment and in total:
December 31 |  | East Group |  |  | West Group |  |  | Total |
(in millions) |  | 2021 |
Balance at beginning of period |  | $ | 572.5 |  |  | $ | 1,841.5 |  |  | $ | 2,414.0 |
Acquisitions |  |  | 186.9 |  |  |  | 893.5 |  |  |  | 1,080.4 |
Balance at end of period |  | $ | 759.4 |  |  | $ | 2,735.0 |  |  | $ | 3,494.4 |
|  | 2020 |
Balance at beginning of period |  | $ | 574.3 |  |  | $ | 1,822.5 |  |  | $ | 2,396.8 |
Acquisitions |  |  | — |  |  |  | 17.3 |  |  |  | 17.3 |
Goodwill reclassified from/(allocated to) assets held for sale |  |  | 0.1 |  |  |  | (0.1 | ) |  |  | — |
Divestitures |  |  | — |  |  |  | (0.1 | ) |  |  | (0.1 | )
Transfer of operations from East Group to West Group |  |  | (1.9 | ) |  |  | 1.9 |  |  |  | — |
Balance at end of period |  | $ | 572.5 |  |  | $ | 1,841.5 |  |  | $ | 2,414.0 |
Intangible assets subject to amortization consist of the following:
December 31 |  | Gross Amount |  |  | Accumulated Amortization |  |  | Net Balance |
(in millions) |  | 2021 |
Noncompetition agreements |  | $ | 4.2 |  |  | $ | (4.1 | ) |  | $ | 0.1 |
Customer relationships |  |  | 425.3 |  |  |  | (49.2 | ) |  |  | 376.1 |
Operating permits |  |  | 697.3 |  |  |  | (56.6 | ) |  |  | 640.7 |
Use rights and other |  |  | 16.3 |  |  |  | (13.9 | ) |  |  | 2.4 |
Trade names |  |  | 23.3 |  |  |  | (13.6 | ) |  |  | 9.7 |
Total |  | $ | 1,166.4 |  |  | $ | (137.4 | ) |  | $ | 1,029.0 |
|  | 2020 |
Noncompetition agreements |  | $ | 4.2 |  |  | $ | (4.1 | ) |  | $ | 0.1 |
Customer relationships |  |  | 91.3 |  |  |  | (35.6 | ) |  |  | 55.7 |
Operating permits |  |  | 460.8 |  |  |  | (48.4 | ) |  |  | 412.4 |
Use rights and other |  |  | 16.3 |  |  |  | (13.0 | ) |  |  | 3.3 |
Trade names |  |  | 12.8 |  |  |  | (12.3 | ) |  |  | 0.5 |
Total |  | $ | 585.4 |  |  | $ | (113.4 | ) |  | $ | 472.0 |
Intangible assets deemed to have an indefinite life that are therefore not amortized consist of the following as of December 31, 2021 and 2020:
(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 |
During 2021, the Company acquired $845.9 million of intangible assets, of which $264.9 million were classified as held for sale as of December 31, 2021 (see Note D). Excluding the intangible assets classified as held for sale, acquired intangible assets consist of the following:
(in millions, except year data) |  | Amount |  |  | Weighted-average amortization period
Subject to amortization: |  |  |  |  |  |
Customer relationships |  | $ | 334.0 |  |  | 25 years
Trade name |  |  | 10.5 |  |  | 9 years
Operating permits |  |  | 236.5 |  |  | 40 years
Total subject to amortization |  | $ | 581.0 |  |  | 31 years
Total amortization expense for intangible assets for the years ended December 31, 2021, 2020 and 2019 was $24.0 million, $13.4 million and $13.0 million, respectively. The intangible assets classified as held for sale are not being amortized. The estimated amortization expense for intangible assets for each of the next five years and thereafter is as follows:
(in millions) |  |  |  |
2022 |  | $ | 34.1 |
2023 |  |  | 33.8 |
2024 |  |  | 33.6 |
2025 |  |  | 33.4 |
2026 |  |  | 31.9 |
Thereafter |  |  | 862.2 |
Total |  | $ | 1,029.0 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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