(in millions)

2026

Gross cost at January 1

$

373.3

Additions

5.0

Exchange effect

(3.6

)

Gross cost at June 30

374.7

Accumulated amortization at January 1

(305.6

)

Amortization expense

(5.4

)

Exchange effect

1.6

Accumulated amortization at June 30

(309.4

)

Net book amount at June 30

$

65.3