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Other Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Other Intangible Assets

The following table analyzes other intangible assets movements in the year:

 

(in millions)

 

2024

 

Gross cost at January 1

 

$

315.1

 

Additions

 

 

11.5

 

Exchange effect

 

 

(2.6

)

Gross cost at June 30

 

 

324.0

 

Accumulated amortization at January 1

 

 

(257.8

)

Amortization expense

 

 

(6.0

)

Exchange effect

 

 

1.2

 

Accumulated amortization at June 30

 

 

(262.6

)

Net book amount at June 30

 

$

61.4