| Summary of Intangible Assets and Goodwill |
| | | | | | | | | | | | | | | | | | | | | | | | $ million | | | | Other intangible assets | | Goodwill | | LNG off-take
and sales contracts | | Environmental certificates | Other | | Total | | Cost | | | | | | | | | | At January 1 | 18,542 | | 9,734 | | 2,391 | 9,642 | | 21,767 | | Additions | 155 | | — | | 3,862 | 594 | | 4,456 | Sales, retirements and other movements [A] | (195) | | (3,147) | | (3,668) | (180) |
| (6,995) | | Currency translation differences | (220) | | — | | (71) | (258) | | (329) | | At December 31 | 18,282 | | 6,587 | | 2,514 | 9,798 | | 18,899 | | Depreciation, depletion and amortisation, including impairments | | | | | | | | | | At January 1 | 1,882 | | 6,751 | | | 4,763 | | 11,514 | Charge for the year [B] | 510 | | 590 | | | 744 | | 1,334 | Sales, retirements and other movements [A] | (101) | | (3,147) | | | (169) | | (3,316) | | Currency translation differences | (41) | | — | | | (113) | | (113) | | At December 31 | 2,250 | | 4,194 | | | 5,225 | | 9,419 | | Carrying amount at December 31 | 16,032 | | 2,393 | | 2,514 | 4,573 | [C] | 9,480 |
[A]Includes the reclassification of assets classified as held for sale. (See Note 19). [B]Includes impairment losses and reversals (except for Goodwill). (See Note 13). [C]Includes software ($1,013 million), power purchase agreements, retail customer relationships and trademarks. 11. Goodwill and other intangible assets continued
| | | | | | | | | | | | | | | | | | | | | | | | | | $ million | | | | Other intangible assets | | Goodwill | | LNG off-take
and sales contracts | Environmental certificates | | Other | | Total | | Cost | | | | | | | | | | At January 1 | 17,557 | | 9,833 | 2,201 | | 8,158 | | 20,192 | | Additions | 1,436 | | — | 3,837 | | 1,721 | [C] | 5,558 | Sales, retirements and other movements [A] | (506) | | (99) | (3,714) | | (376) |
| (4,189) | | Currency translation differences | 55 | | — | 67 | | 139 | | 206 | | At December 31 | 18,542 | | 9,734 | 2,391 | | 9,642 | | 21,767 | | Depreciation, depletion and amortisation, including impairments | | | | | | | | | | At January 1 | 1,518 | | 6,060 | | | 4,470 | | 10,530 | Charge for the year [B] | 635 | | 790 | | | 442 | | 1,232 | Sales, retirements and other movements [A] | (296) | | (99) | | | (222) | | (321) | | Currency translation differences | 25 | | — | | | 73 | | 73 | | At December 31 | 1,882 | | 6,751 | | | 4,763 | | 11,514 | | Carrying amount at December 31 | 16,660 | | 2,983 | 2,391 | | 4,879 | [D] | 10,253 |
[A]Includes the reclassification of assets classified as held for sale. (See Note 19). [B]Includes impairment losses and reversals. (See Note 13). [C]Includes feedstock supply contracts and intellectual property rights ($948 million) from an acquisition in Marketing and software ($357 million) primarily in Integrated Gas and Marketing. [D]Includes software ($829 million), power purchase agreements, retail customer relationships and trademarks.
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