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GOODWILL AND INTANGIBLE ASSETS
 9 Months Ended
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)9/30/202212/31/2021
Goodwill$2,652.4 $2,693.2 
Indefinite-lived intangible assets - trade name134.7 134.7 
Indefinite-lived intangible assets - investment advisory agreements164.8 164.8 
Definite-lived intangible assets - investment advisory agreements532.5 613.9 
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 9/30/2022Nine 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.