| Property, Plant and Equipment |
Property, plant and equipment | | | | | | | | | | | | | | | | | | | $ million | | Exploration and production | | | | | Exploration
and evaluation | Production | Manufacturing,
supply and
distribution | Other | Total | | Cost | | | | | | | At January 1 | 11,565 | 277,016 | 106,785 | 39,595 | 434,961 | | Additions | 2,161 | 10,731 | 5,910 | 7,029 | 25,831 | | Sales, retirements and other movements [B] | (5,164) | (1,153) | (1,016) | (1,387) | (8,720) | Reclassifications [C] | — | (2,779) | 527 | 2,252 | — | | Currency translation differences | 73 | 1,855 | 863 | 207 | 2,998 | | At December 31 | 8,635 | 285,670 | 113,069 | 47,696 | 455,070 | | Depreciation, depletion and amortisation, including impairments | | | | | | | At January 1 | 5,162 | 159,662 | 56,901 | 14,594 | 236,319 | Charge for the year [D] | 731 | 18,202 | 8,295 | 2,687 | 29,915 | | Sales, retirements and other movements [B] | (2,609) | (2,000) | (2,083) | (1,394) | (8,086) | Reclassifications [C] | — | (2,217) | 63 | 2,154 | — | | Currency translation differences | 39 | 1,326 | 650 | 72 | 2,087 | | At December 31 | 3,323 | 174,973 | 63,826 | 18,113 | 260,235 | | Carrying amount at December 31 | 5,312 | 110,697 | 49,243 | 29,583 | 194,835 |
[A]Includes right-of-use assets under leases. (See Note 21). [B]Includes the reclassification of assets classified as held for sale. (See Note 18). [C]Reclassifications of right-of-use assets. (See Note 21). [D]Includes impairment losses and reversals. (See Note 12). | | | | | | | | | | | | | | | | | | | $ million | | Exploration and production | | | | | Exploration
and evaluation | Production | Manufacturing,
supply and
distribution | Other | Total | | Cost | | | | | | | At January 1 | 12,679 | 285,903 | 104,182 | 34,005 | 436,769 | | Additions | 1,564 | 11,954 | 6,928 | 7,808 | 28,254 | | Sales, retirements and other movements [B] | (2,469) | (14,541) | (2,548) | (242) | (19,800) | | Currency translation differences | (209) | (6,300) | (1,777) | (1,976) | (10,262) | | At December 31 | 11,565 | 277,016 | 106,785 | 39,595 | 434,961 | | Depreciation, depletion and amortisation, including impairments | | | | | | | At January 1 | 5,580 | 167,530 | 55,131 | 13,596 | 241,837 | | Charge for the year [C] | 397 | 9,709 | 5,149 | 2,055 | 17,310 | | Sales, retirements and other movements [B] | (765) | (13,207) | (2,054) | (396) | (16,422) | | Currency translation differences | (50) | (4,370) | (1,325) | (661) | (6,406) | | At December 31 | 5,162 | 159,662 | 56,901 | 14,594 | 236,319 | | Carrying amount at December 31 | 6,403 | 117,354 | 49,884 | 25,001 | 198,642 |
[A]Includes right-of-use assets under leases. (See Note 21). [B]Includes the reclassification of assets classified as held for sale. (See Note 18). [C]Includes impairment losses and reversals. (See Note 12). 11. Property, plant and equipment continued The carrying amount of property, plant and equipment at December 31, 2023, included $28,135 million (2022: $27,277 million) of assets under construction. This amount excludes exploration and evaluation assets. The carrying amount of exploration and production assets at December 31, 2023, included rights and concessions in respect of proved and unproved properties of $6,097 million (2022: $7,662 million). Exploration and evaluation assets principally comprise rights and concessions in respect of unproved properties and capitalised exploration drilling costs. The total contractual commitments for the purchase and lease of property, plant and equipment at December 31, 2023, amounted to $12,419 million of which $8,594 million related to lease commitments. | | | | Capitalised exploration drilling costs |
| | | | | | | | | | | | | $ million | | 2023 | 2022 | 2021 | | At January 1 | 2,911 | 3,015 | 3,654 | | Additions pending determination of proved reserves | 1,967 | 1,298 | 1,024 | | Amounts charged to expense | (868) | (881) | (639) | | Reclassifications to productive wells on determination of proved reserves | (874) | (531) | (577) | | Other movements | — | 10 | (447) | | At December 31 | 3,136 | 2,911 | 3,015 |
| | | | | | | | | | | | | | | | | | | Projects | | Wells | | Number | $ million | | Number | $ million | | Between 1 and 5 years | 13 | 721 | | 14 | 353 | | Between 6 and 10 years | 6 | 704 | | 22 | 708 | | Between 11 and 15 years | 2 | 69 | | 20 | 390 | | Between 16 and 20 years | 2 | 124 | | 8 | 167 | | Total | 23 | 1,618 | | 64 | 1,618 |
Exploration drilling costs capitalised for periods greater than one year at December 31, 2023, analysed according to the most recent year of activity, are presented in the table above. These comprise $273 million relating to five projects where drilling activities were under way or firmly planned for the future, and $1,345 million relating to 18 projects awaiting development concepts.
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