" alt="Alpiq Banner Interim Report" />9 Energy purchase rights and intangible assets
| CHF million | Energy purchase rights | Goodwill | Other intangible assets | Total |
|---|---|---|---|---|
| 1 CHF 15 million charged to energy costs and CHF 19 million charged to amortisation. | ||||
| Gross carrying amount at 31 December 2007 | 626 | 256 | 299 | 1,181 |
| Acquisition / disposal of subsidiaries | 50 | 123 | 173 | |
| Additions | 10 | 10 | ||
| Disposals | – 13 | – 13 | ||
| Exchange differences | – 30 | – 30 | – 60 | |
| Gross carrying amount at 31 December 2008 | 626 | 276 | 389 | 1,291 |
| Acquisition / disposal of subsidiaries | 1,467 | 410 | 218 | 2,095 |
| Additions | 20 | 20 | ||
| Transfers | 55 | – 55 | 0 | |
| Disposals | – 4 | – 10 | – 14 | |
| Exchange differences | – 1 | – 4 | – 5 | |
| Gross carrying amount at 31 December 2009 | 2,148 | 681 | 558 | 3,387 |
| Accum. amortisation at 31 December 2007 | 420 | 3 | 92 | 515 |
| Amortisation charge | 52 | 23 | 75 | |
| Impairment 1 | 3 | 31 | 34 | |
| Disposals | – 13 | – 13 | ||
| Exchange differences | – 1 | – 7 | – 8 | |
| Accum. amortisation at 31 December 2008 | 472 | 5 | 126 | 603 |
| Amortisation charge | 163 | 46 | 209 | |
| Transfers | 19 | – 19 | 0 | |
| Disposals | – 5 | – 5 | – 10 | |
| Accum. amortisation at 31 December 2009 | 654 | 0 | 148 | 802 |
| Net carrying amount at 31 December 2008 | 154 | 271 | 263 | 688 |
| Net carrying amount at 31 December 2009 | 1,494 | 681 | 410 | 2,585 |
Information about impairment losses on "goodwill" is presented in note 4. The impairment losses on "other intangible assets" relate to adjustments on emission allowances and on a customer base.
No borrowing costs were capitalised in 2008 and 2009.
The carrying amount of other intangible assets with indefinite useful lives was CHF45million at 31 December 2009 (2008: CHF45million). These assets mainly comprise rights to use property, plant and equipment owned by third parties which, according to current assessments, have an indefinite useful life for the Alpiq Group. The category of intangible assets with indefinite useful lives is allocated to the "Grid Switzerland" cash-generating unit in the Energy segment.