10) Intangible assets

Table : Intangible assets 2014

Table : Intangible assets 2013

Table : Intangible assets 2012

Changes in net intangible assets are analyzed in the following table:

Table : Changes in net intangible assets

In 2014, the heading “Amortization and impairment” includes the accounting impact of exceptional asset impairments for an amount of $3,177 million (see Note 4) "Business segment information" D) "Adjustment items by business segment" to the Consolidated Financial Statements).

In 2014, the heading “Other” mainly includes mineral interests in Utica reclassified into acquisitions for $(524) million, the recognition of mineral interests in Papua New Guinea for $429 million, the reclassification of assets in accordance with IFRS 5 “Non-current assets held for sale and discontinued operations” for $(561) million(see Note 34) "Changes in progress in the Group structure" to the Consolidated Financial Statements). and the reversal of the reclassification under IFRS 5 as at December 31, 2013 for $96 million corresponding to disposals.

In 2013, the heading “Other” mainly included mineral interests in Utica reclassified into acquisitions for $(604) million, the reclassification of assets in accordance with IFRS 5 “Non-current assets held for sale and discontinued operations” for $(93) million(see Note 34) "Changes in progress in the Group structure" to the Consolidated Financial Statements).and the reversal of the reclassification under IFRS 5 as at December 31, 2012 for $331 million corresponding to disposals.

In 2012, the heading “Other” mainly included the reclassification of assets in accordance with IFRS 5 “Non-current assets held for sale and discontinued operations” for $(428) million (see Note 34) "Changes in progress in the Group structure" to the Consolidated Financial Statements).

A summary of changes in the carrying amount of goodwill by business segment for the year ended December 31, 2014 is as follows:

Table : A summary of changes in the carrying amount of goodwill by business segment