15. Property, plant and equipment

In 2014 and in 2013, changes in the gross carrying amount of Property, plant and equipment were as follows:

($ million)At December 31, 2013AdditionsDivestituresTranslation differencesOther changesAt December 31, 2014
Land 331 - (2) (28) (1) 300
Owned industrial buildings 3,083 132 (45) (277) 58 2,951
  
Industrial buildings leased under finance leases 64 5 - (6) (8) 55
Total Industrial buildings 3,147 137 (45) (283) 50 3,006
Owned plant, machinery and equipment 8,387 620 (109) (869) 234 8,263
Plant, machinery and equipment leased under finance leases 94 12 - (12) - 94
Total Plant, machinery and equipment 8,481 632 (109) (881) 234 8,357
Assets sold with a buy-back commitment      2,611 793 (143) (330) (389) 2,542
Owned other tangible assets 960 40 (13) (86) (34) 867
Other tangible assets leased under finance leases - - - - 1 1
Total Other tangible assets 960 40 (13) (86) (33) 868
  
Advances and tangible assets in progress 516 85 (11) (22) (355) 213
Total gross carrying amount of Property, plant and equipment 16,046 1,687 (323) (1,630) (494) 15,286

($ million)At December 31, 2012AdditionsDivestituresTranslation differencesOther changesAt December 31, 2013
Land 304 1 (1) 3 24 331
Owned industrial buildings 2,780 189 (11) 34 91 3,083
Industrial buildings leased under finance leases 52 10 - 1 1 64
Total Industrial buildings 2,832 199 (11) 35 92 3,147
Owned plant, machinery and equipment 8,015 369 (387) 156 234 8,387
Plant, machinery and equipment leased under finance leases 81 13 (1) 4 (3) 94
Total Plant, machinery and equipment 8,096 382 (388) 160 231 8,481
Assets sold with a buy-back commitment 2,059 796 - 104 (348) 2,611
Owned other tangible assets 943 23 (47) 15 26 960
Other tangible assets leased under finance leases 3 - (3) - - -
Total Other tangible assets 946 23 (50) 15 26 960
Advances and tangible assets in progress 324 515 (2) 4 (325) 516
Total gross carrying amount of Property, plant and equipment 14,561 1,916 (452) 321 (300) 16,046

In 2014 and in 2013, changes in accumulated depreciation and impairment losses were as follows:

($ million)At December 31, 2013DepreciationImpairment lossesDivestituresTranslation differencesOther changesAt December 31, 2014
Land                                                            -  1  5
Owned industrial buildings 1,627 109   -             (38) (158) (38) 1,502
Industrial buildings leased under finance leases 8 1   -                   - (1) (2) 6
Total Industrial buildings 1,635 110   -             (38) (159) (40) 1,508
Owned plant, machinery and equipment 6,052 455   -           (103) (649) (10) 5,745
Plant, machinery and equipment leased under finance leases 30 6   -                   - - - 36
Total Plant, machinery and equipment 6,082 461   -           (103) (649) (10) 5,781
Assets sold with a buy-back commitment                    611 250 22 (62) (80) (152) 589
Owned other tangible assets 747 52 16 (16) (73) (40) 670
Other tangible assets leased under finance leases - - - - - - -
Total Other tangible assets 747 52 - (16) (73) (40) 670
Advances and tangible assets in progress - - - - - - -
Total accumulated depreciation and impairment of Property, plant and equipment 9,079 873 22 (219) (961) (241) 8,553

($ million)At December 31, 2012DepreciationImpairment lossesDivestituresTranslation differencesOther changesAt December 31, 2013
Land                                                           4 - - - - - 4
Owned industrial buildings 1,502 97 - -9 37 - 1,627
Industrial buildings leased under finance leases 7 1 - - - - 8
Total Industrial buildings 1,509 98 - -9 37 - 1,635
Owned plant, machinery and equipment 5,830 426 - (372) 148 20 6,052
Plant, machinery and equipment leased under finance leases 25 6 - (1) 1 (1) 30
Total Plant, machinery and equipment 5,855 432 - (373) 149 19 6,082
Assets sold with a buy-back commitment                    442 274 37 - 24 (166) 611
Owned other tangible assets 717 50 - (45) 17 8 747
Other tangible assets leased under finance leases 2 - - -2 - - -
Total Other tangible assets 719 50 - (47) 17 8 747
Advances and tangible assets in progress - - - - - - -
Total accumulated depreciation and impairment of Property, plant and equipment 8,529 854 37 (429) 227 (139) 9,079

In 2014 and in 2013, changes in the net carrying amount of Property, plant and equipment were as follows:

($ million)At December 31, 2013AdditionsDepreciationImpairment lossesDivestituresTranslation differencesOther changesAt December 31, 2014
Land 327 - - - (2) (28) (2) 295
Owned industrial buildings 1,456 132 (109) - (7) (119) 96 1,449
Industrial buildings leased under fi nance leases 56 5 (1) - - (5) (6) 49
Total Industrial buildings 1,512 137 (110) - (7) (124) 90 1,498
Owned plant, machinery and equipment 2,335 620 (455) - (6) (220) 244 2,518
Plant, machinery and equipment leased under fi nance leases 64 12 (6) - - (12) - 58
Total Plant, machinery and equipment 2,399 632 (461) - (6) (232) 244 2,576
Assets sold with a buy-back commitment 2,000 793 (250) (22) (81) (250) (237) 1,953
Owned other tangible assets 213 40 (52) - 3 (13) 6 197
Other tangible assets leased under fi nance leases - - - - - - 1 1
Total Other tangible assets 213 40 (52) - 3 (13) 7 198
Advances and tangible assets in progress 516 85 - - (11) (22) (355) 213
Total net carrying amount of Property, plant and equipment 6,967 1,687 (873) (22) (104) (669) (253) 6,733

($ million)At December 31, 2012AdditionsDepreciationImpairment lossesDivestituresTranslation differencesOther changesAt December 31, 2013
Land 300 1 - - (1) 3 24 327
Owned industrial buildings 1,278 189 (97) - (2) (3) 91 1,456
Industrial buildings leased under fi nance leases 45 10 (1) - - 1 1 56
Total Industrial buildings 1,323 199 (98) - (2) (2) 92 1,512
Owned plant, machinery and equipment 2,185 369 (426) - (15) 8 214 2,335
Plant, machinery and equipment leased under fi nance leases 56 13 (6) - - 3 (2) 64
Total Plant, machinery and equipment 2,241 382 (432) - (15) 11 212 2,399
Assets sold with a buy-back commitment 1,617 796 (274) (37) - 80 (182) 2,000
Owned other tangible assets 226 23 (50) - (2) (2) 18 213
Other tangible assets leased under fi nance leases 1 - - - (1) - - -
Total Other tangible assets 227 23 (50) - (3) (2) 18 213
Advances and tangible assets in progress 324 515 - - (2) 4 (325) 516
Total net carrying amount of Property, plant and equipment 6,032 1,916 (854) (37) (23) 94 (161) 6,967

Additions of $1,687 million in 2014 mainly relate to Agricultural Equipment, Construction Equipment and Commercial Vehicles.

During 2014 Commercial Vehicles recognized impairment losses on Assets sold with a buy-back commitment for an amount of $22 million ($37 million in 2013) in order to align their carrying amount to market value. These losses are fully recognized in Cost of sales.

The column Other changes mainly includes the reclassifi cation of the prior year balances for Advances and tangible assets in progress to the appropriate categories when the assets were effectively acquired and put into operation, as well as the reclassifi cation to Inventory of Assets sold with a buy-back commitment that are held for sale at the agreement expiry date of $237 million.

At December 31, 2014, land and industrial buildings of the Group pledged as security for debt amounted to $93 million ($101 million at December 31, 2013); plant, machinery and equipment pledged as security for debt and other commitments amounted to $98 million ($103 million at December 31, 2013) and other assets pledged as security for debt and other commitments amounted to $1 million (zero at December 31, 2013); these relate to suppliers’ assets recognized in the Consolidated Financial Statements in accordance with IFRIC 4, with the simultaneous recognition of a fi nancial lease payable.

At December 31, 2014, the Group had contractual commitments for the acquisition of proper ty, plant and equipment amounting to $397 million ($348 million at December 31, 2013).