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Other intangible assets
9 Months Ended
Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Other intangible assets
6.    Other intangible assets
The following table presents the components of other intangible assets:
(in millions)
September 30, 2023
December 31, 2022
Gross value
Accumulated amortization and impairment1
Carrying valueGross value
Accumulated amortization and impairment1
Carrying value
Customer relationships$4,793.6 $1,579.8 $3,213.8 $4,806.4 $1,333.5 $3,472.9 
Trade names353.6 218.5 135.1 354.4 205.1 149.3 
Other629.9 283.0 346.9 630.9 212.1 418.8 
Total finite-lived$5,777.1 $2,081.3 3,695.8 $5,791.7 $1,750.7 4,041.0 
Indefinite-lived92.3 92.3 
Total$3,788.1 $4,133.3 
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1.As of September 30, 2023, accumulated impairment losses on Customer relationships were $65.9 million and on Other were $40.5 million totaling $106.4 million. As of December 31, 2022, there were no accumulated impairment losses.