| Goodwill and Other Intangible Assets, Net |
GOODWILL AND OTHER INTANGIBLE ASSETS, NET Goodwill A summary of the activity and balances in goodwill accounts by reporting segment follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Balance as of December 31, 2022 | | Acquisitions | | Divestitures | | Adjustments to
Acquisitions | | Balance as of December 31, 2023 | | Group 1 | $ | 6,637.9 | | | $ | 675.4 | | | $ | — | | | $ | (0.9) | | | $ | 7,312.4 | | | Group 2 | 6,238.3 | | | 208.2 | | | (1.9) | | | 0.9 | | | 6,445.5 | | | Group 3 | 1,575.3 | | | 274.3 | | | — | | | 227.0 | | | 2,076.6 | | | Total | $ | 14,451.5 | | | $ | 1,157.9 | | | $ | (1.9) | | | $ | 227.0 | | | $ | 15,834.5 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Balance as of December 31, 2021 | | Acquisitions | | Divestitures | | Adjustments to
Acquisitions | | Balance as of December 31, 2022 | | Group 1 | $ | 6,549.7 | | | $ | 95.2 | | | $ | — | | | $ | (7.0) | | | $ | 6,637.9 | | | Group 2 | 5,994.2 | | | 239.0 | | | (3.7) | | | 8.8 | | | 6,238.3 | | | Group 3 | 282.1 | | | 1,316.5 | | | (0.3) | | | (23.0) | | | 1,575.3 | | | Total | $ | 12,826.0 | | | $ | 1,650.7 | | | $ | (4.0) | | | $ | (21.2) | | | $ | 14,451.5 | |
Adjustments to acquisitions during the year ended December 31, 2023 primarily related to changes in our valuation of tangible assets acquired and certain environmental liabilities assumed in connection with our acquisition of US Ecology. Adjustments to acquisitions during the year ended December 31, 2022 primarily related to changes in our valuation of tangible and intangible assets as well as certain landfill leases and environmental liabilities assumed as a result of obtaining new information regarding the acquisitions that closed in 2021. Other Intangible Assets, Net Other intangible assets, net, include values assigned to customer relationships, non-compete agreements and trade names, and are amortized over periods ranging from 1 to 15 years. A summary of the activity and balances by intangible asset type follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Gross Intangible Assets | | Accumulated Amortization | | Other Intangible Assets, Net as of December 31, 2023 | | | Balance as of December 31, 2022 | | Acquisitions | | Adjustments and Other | | Balance as of December 31, 2023 | | Balance as of December 31, 2022 | | Additions
Charged
to Expense | | Adjustments and Other | | Balance as of December 31, 2023 | | Customer relationships | $ | 1,013.5 | | | $ | 197.3 | | | $ | (579.1) | | | $ | 631.7 | | | $ | (709.1) | | | $ | (53.7) | | | $ | 597.1 | | | $ | (165.7) | | | $ | 466.0 | | Non-compete agreements | 67.9 | | | 4.2 | | | (41.7) | | | 30.4 | | | (50.9) | | | (6.5) | | | 41.7 | | | (15.7) | | | 14.7 | | Other intangible assets | 77.0 | | | 2.4 | | | (56.2) | | | 23.2 | | | (51.2) | | | (6.1) | | | 49.6 | | | (7.7) | | | 15.5 | | | Total | $ | 1,158.4 | | | $ | 203.9 | | | $ | (677.0) | | | $ | 685.3 | | | $ | (811.2) | | | $ | (66.3) | | | $ | 688.4 | | | $ | (189.1) | | | $ | 496.2 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Gross Intangible Assets | | Accumulated Amortization | | Other Intangible Assets, Net as of December 31, 2022 | | | Balance as of December 31, 2021 | | Acquisitions | | Adjustments and Other | | Balance as of December 31, 2022 | | Balance as of December 31, 2021 | | Additions
Charged
to Expense | | Adjustments and Other | | Balance as of December 31, 2022 | | Customer relationships | $ | 898.4 | | | $ | 109.2 | | | $ | 5.9 | | | $ | 1,013.5 | | | $ | (666.8) | | | $ | (42.3) | | | $ | — | | | $ | (709.1) | | | $ | 304.4 | | Non-compete agreements | 60.4 | | | 7.7 | | | (0.2) | | | 67.9 | | | (44.6) | | | (6.3) | | | — | | | (50.9) | | | 17.0 | | Other intangible assets | 58.0 | | | 16.0 | | | 3.0 | | | 77.0 | | | (45.9) | | | (5.3) | | | — | | | (51.2) | | | 25.8 | | | Total | $ | 1,016.8 | | | $ | 132.9 | | | $ | 8.7 | | | $ | 1,158.4 | | | $ | (757.3) | | | $ | (53.9) | | | $ | — | | | $ | (811.2) | | | $ | 347.2 | |
Based on the amortizable intangible assets recorded in the consolidated balance sheet as of December 31, 2023, amortization expense for each of the next five years is estimated as follows: | | | | | | | 2024 | $ | 73.5 | | | 2025 | $ | 68.7 | | | 2026 | $ | 64.9 | | | 2027 | $ | 58.5 | | | 2028 | $ | 55.2 | |
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