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GOODWILL AND INTANGIBLE ASSETS | 9 Months Ended
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Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND INTANGIBLE ASSETS | GOODWILL AND INTANGIBLE ASSETS. Goodwill and intangible assets consist of the following:
(in millions) |  | 9/30/2022 |  | 12/31/2021
Goodwill |  | $ | 2,652.4 |  |  | $ | 2,693.2 |
Indefinite-lived intangible assets - trade name |  | 134.7 |  |  | 134.7 |
Indefinite-lived intangible assets - investment advisory agreements |  | 164.8 |  |  | 164.8 |
Definite-lived intangible assets - investment advisory agreements |  | 532.5 |  |  | 613.9 |
Total |  | $ | 3,484.4 |  |  | $ | 3,606.6 |
Amortization expense for the definite-lived investment advisory agreements intangible assets was $27.1 million and $81.4 million for the three- and nine- months ended September 30, 2022, respectively. Estimated amortization expense for the definite-lived investment advisory agreements intangible assets for the remainder of 2022 is $27.1 million, $108.1 million for 2023, $105.6 million for 2024, $105.0 million for 2025, and $87.7 million for 2026. Goodwill activity during the three- and nine- months ended September 30, 2022 was as follows:
(in millions) | Three months ended 9/30/2022 |  | Nine months ended 9/30/2022
Balance at beginning of period | $ | 2,652.4 |  |  | $ | 2,693.2 |
Measurement period adjustment | — |  |  | (40.8) |
Balance, September 30, 2022 | $ | 2,652.4 |  |  | $ | 2,652.4 |
We evaluate the carrying amount of goodwill for possible impairment on an annual basis in the fourth quarter using a fair value approach or if triggering events occur that require us to evaluate for impairment earlier.

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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 https://asc.fasb.org/topic&trid=2144416 + Details
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