Nine Months Ended
September 30

(in millions)

2012

2011

Gross cost at January 1

$

51.2

$

48.1

Capitalization of internally developed software and other costs

6.4

0.0

Exchange effect

0.2

Gross cost at September 30

57.8

48.3

Accumulated amortization at January 1

(33.5

)

(29.1

)

Amortization expense

(3.1

)

(3.4

)

Exchange effect

(0.2

)

(0.2

)

Accumulated amortization at September 30

(36.8

)

(32.7

)

Net book amount at September 30

$

21.0

$

15.6