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Goodwill and Acquired Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible assets consisted of the following as of September 30, 2022:
(in millions)Gross Carrying AmountAccumulated AmortizationNetWeighted Average Amortization Period in Years
Intangible assets subject to amortization:
Customer relationships$287.6 $(87.0)$200.6 14.4
Acquired technology330.8 (157.0)173.8 6.3
Brand portfolio11.5 (5.4)6.1 7.5
Net intangible assets subject to amortization$629.9 $(249.4)$380.5 
Intangible assets not subject to amortization
Pre-Acquisition ZI brand portfolio$33.0 $— $33.0 
Goodwill$1,696.3 $— $1,696.3 
Changes to Goodwill
The following summarized changes to the Company’s goodwill (in millions):
Balance at December 31, 2021$1,575.1 
Adjustments from 2021 acquisitions(1.8)
Goodwill from 2022 acquisitions123.0 
Balance at September 30, 2022$1,696.3